A boundary between geological divisons of time
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.
creator: foaf.rdf
publisher: foaf.rdf
label: Geochronological Boundary
type: ConceptScheme

Base Neoproterozoic Iii [Obsolete Name And Code: Use Ad]
type: Concept
in scheme: A boundary between geological divisons of time
age value: 635
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Palaeoarchaean
type: Concept
in scheme: A boundary between geological divisons of time
age value: 3600
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Ectasian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1400
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Cryogenian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 850
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Ediacaran
type: Concept
in scheme: A boundary between geological divisons of time
age value: 635
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Rhyacian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2300
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Stenian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1200
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Mesoarchaean
type: Concept
in scheme: A boundary between geological divisons of time
age value: 3200
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Neoarchaean
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2800
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Orosirian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2050
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Proterozoic
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2500
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Stratherian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1800
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Archaean
type: Concept
in scheme: A boundary between geological divisons of time
age value: 4000
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Mesoproterozoic
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1600
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Neoproterozoic
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1000
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Bavelian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Cromerian Complex
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Weichselian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 0
age value uncertainty: 0
age determination: QUAT
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Eburonian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Holsteinian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 0
age value uncertainty: 0
age determination: QUAT
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Eemian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 0
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Elsterian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 0
age value uncertainty: 0
age determination: QUAT
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Menapian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Praetiglian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Saalian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 0
age value uncertainty: 0
age determination: QUAT
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Tiglian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Waalian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Carboniferous
type: Concept
in scheme: A boundary between geological divisons of time
age value: 359
age value uncertainty: 3
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Duckmantian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 312
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Westphalian B
type: Concept
in scheme: A boundary between geological divisons of time
age value: 312
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Bolsovian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 310
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Westphalian C
type: Concept
in scheme: A boundary between geological divisons of time
age value: 310
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Westphalian D
type: Concept
in scheme: A boundary between geological divisons of time
age value: 309
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Arnsbergian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 322
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Gzhelian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 304
age value uncertainty: 1
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Chadian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 352
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Arundian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 343
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Kinderscoutian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 316
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Mid Mississippian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 345
age value uncertainty: 2
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Alportian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 317
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Pennsylvanian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 318
age value uncertainty: 1
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Late Pennsylvanian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 307
age value uncertainty: 1
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Mid Pennsylvanian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 312
age value uncertainty: 1
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Holkerian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 339
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Asbian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 335
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Stephanian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 307
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Silesian [Obsolete Name And Code]
type: Concept
in scheme: A boundary between geological divisons of time
age value: 326
age value uncertainty: 2
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Westphalian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 313
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Brigantian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 331
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Yeadonian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 314
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marsdenian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 315
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Famennian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 375
age value uncertainty: 3
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Emsian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 407
age value uncertainty: 3
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Mid Devonian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 398
age value uncertainty: 3
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Pragian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 411
age value uncertainty: 3
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Late Devonian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 385
age value uncertainty: 3
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Givetian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 392
age value uncertainty: 3
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Cambrian Stage 2
type: Concept
in scheme: A boundary between geological divisons of time
age value: 535
age value uncertainty: 0
age determination: APPROX
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Cambrian Stage 4
type: Concept
in scheme: A boundary between geological divisons of time
age value: 517
age value uncertainty: 0
age determination: APPROX
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Cambrian Stage 9
type: Concept
in scheme: A boundary between geological divisons of time
age value: 496
age value uncertainty: 0
age determination: APPROX
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Cambrian Stage 10
type: Concept
in scheme: A boundary between geological divisons of time
age value: 492
age value uncertainty: 0
age determination: APPROX
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Cambrian Series 2
type: Concept
in scheme: A boundary between geological divisons of time
age value: 521
age value uncertainty: 0
age determination: APPROX
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Cambrian Series 3
type: Concept
in scheme: A boundary between geological divisons of time
age value: 510
age value uncertainty: 0
age determination: APPROX
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Comley
type: Concept
in scheme: A boundary between geological divisons of time
age value: 528
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base St David'S
type: Concept
in scheme: A boundary between geological divisons of time
age value: 508
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Drumian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 507
age value uncertainty: 0
age determination: APPROX
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Furongian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 501
age value uncertainty: 2
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Guzhangian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 503
age value uncertainty: 0
age determination: APPROX
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Merioneth
type: Concept
in scheme: A boundary between geological divisons of time
age value: 502
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Phanerozoic
type: Concept
in scheme: A boundary between geological divisons of time
age value: 542
age value uncertainty: 1
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Bartonian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 40
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Eocene
type: Concept
in scheme: A boundary between geological divisons of time
age value: 56
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Late Eocene
type: Concept
in scheme: A boundary between geological divisons of time
age value: 37
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Mid Eocene
type: Concept
in scheme: A boundary between geological divisons of time
age value: 49
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Oligocene
type: Concept
in scheme: A boundary between geological divisons of time
age value: 34
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Late Oligocene
type: Concept
in scheme: A boundary between geological divisons of time
age value: 28
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Late Paleocene
type: Concept
in scheme: A boundary between geological divisons of time
age value: 59
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Mid Paleocene
type: Concept
in scheme: A boundary between geological divisons of time
age value: 61
age value uncertainty: 0
age determination: APPROX
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Cenozoic
type: Concept
in scheme: A boundary between geological divisons of time
age value: 66
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Jurassic
type: Concept
in scheme: A boundary between geological divisons of time
age value: 200
age value uncertainty: 1
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Bajocian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 172
age value uncertainty: 3
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Callovian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 165
age value uncertainty: 4
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Kimmeridgian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 156
age value uncertainty: 0
age determination: APPROX
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Pliensbachian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 190
age value uncertainty: 2
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Tithonian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 151
age value uncertainty: 4
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Mid Jurassic
type: Concept
in scheme: A boundary between geological divisons of time
age value: 176
age value uncertainty: 2
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Bathonian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 168
age value uncertainty: 4
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Portlandian [Obsolete Name And Code]
type: Concept
in scheme: A boundary between geological divisons of time
age value: 148
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Sinemurian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 197
age value uncertainty: 1
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Toarcian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 183
age value uncertainty: 2
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Late Jurassic
type: Concept
in scheme: A boundary between geological divisons of time
age value: 161
age value uncertainty: 4
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Volgian [Obsolete Name And Code: Use Ji]
type: Concept
in scheme: A boundary between geological divisons of time
age value: 151
age value uncertainty: 4
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Cretaceous
type: Concept
in scheme: A boundary between geological divisons of time
age value: 146
age value uncertainty: 4
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Albian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 112
age value uncertainty: 1
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Barremian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 130
age value uncertainty: 2
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Campanian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 84
age value uncertainty: 1
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Hauterivian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 134
age value uncertainty: 0
age determination: APPROX
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Maastrichtian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 71
age value uncertainty: 1
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Coniacian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 89
age value uncertainty: 0
age determination: APPROX
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Aptian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 125
age value uncertainty: 1
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Santonian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 86
age value uncertainty: 1
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Turonian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 94
age value uncertainty: 1
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Late Cretaceous
type: Concept
in scheme: A boundary between geological divisons of time
age value: 100
age value uncertainty: 1
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Valanginian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 140
age value uncertainty: 3
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Mesozoic
type: Concept
in scheme: A boundary between geological divisons of time
age value: 251
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Neogene
type: Concept
in scheme: A boundary between geological divisons of time
age value: 23
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Neogene [Obsolete Code: Use N]
type: Concept
in scheme: A boundary between geological divisons of time
age value: 23
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Burdigalian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 20
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Messinian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 7
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Late Miocene
type: Concept
in scheme: A boundary between geological divisons of time
age value: 12
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Mid Miocene
type: Concept
in scheme: A boundary between geological divisons of time
age value: 16
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Pliocene [Obsolete Code: Use Np]
type: Concept
in scheme: A boundary between geological divisons of time
age value: 5
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Late Pliocene
type: Concept
in scheme: A boundary between geological divisons of time
age value: 4
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Pliocene
type: Concept
in scheme: A boundary between geological divisons of time
age value: 5
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Serravallian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 14
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Ordovician
type: Concept
in scheme: A boundary between geological divisons of time
age value: 488
age value uncertainty: 2
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Caradoc
type: Concept
in scheme: A boundary between geological divisons of time
age value: 461
age value uncertainty: 2
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Ashgill
type: Concept
in scheme: A boundary between geological divisons of time
age value: 451
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Caradoc [Obsolete Code: Use O4]
type: Concept
in scheme: A boundary between geological divisons of time
age value: 459
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Llandeilo [Obsolete Name And Code: Use O3]
type: Concept
in scheme: A boundary between geological divisons of time
age value: 464
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Darriwilian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 468
age value uncertainty: 2
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Llanvirn
type: Concept
in scheme: A boundary between geological divisons of time
age value: 467
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Fennian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 471
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Hirnantian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 446
age value uncertainty: 2
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Whitlandian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 475
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Burrellian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 458
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Katian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 456
age value uncertainty: 2
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Longvillian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 456
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Late Ordovician
type: Concept
in scheme: A boundary between geological divisons of time
age value: 461
age value uncertainty: 2
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marshbrookian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 454
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Mid Ordovician
type: Concept
in scheme: A boundary between geological divisons of time
age value: 472
age value uncertainty: 2
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Onnian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 452
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Cheneyan
type: Concept
in scheme: A boundary between geological divisons of time
age value: 455
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Arenig
type: Concept
in scheme: A boundary between geological divisons of time
age value: 479
age value uncertainty: 2
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Cautleyan
type: Concept
in scheme: A boundary between geological divisons of time
age value: 449
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Llanvirn [Obsolete Code: Use Oe Or O2]
type: Concept
in scheme: A boundary between geological divisons of time
age value: 467
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Rawtheyan
type: Concept
in scheme: A boundary between geological divisons of time
age value: 447
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Streffordian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 453
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Soudleyan
type: Concept
in scheme: A boundary between geological divisons of time
age value: 457
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Permian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 299
age value uncertainty: 1
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Artinskian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 284
age value uncertainty: 1
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Kungurian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 276
age value uncertainty: 1
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Sakmarian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 295
age value uncertainty: 1
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Tatarian [Obsolete Name And Code]
type: Concept
in scheme: A boundary between geological divisons of time
age value: 263
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Late Permian [Obsolete Name And Code: Use Pul Or Pug]
type: Concept
in scheme: A boundary between geological divisons of time
age value: 271
age value uncertainty: 1
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Capitanian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 266
age value uncertainty: 1
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Wordian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 268
age value uncertainty: 1
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Guadalupian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 271
age value uncertainty: 1
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Changhsingian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 254
age value uncertainty: 1
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Lopingian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 260
age value uncertainty: 1
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Quaternary
type: Concept
in scheme: A boundary between geological divisons of time
age value: 3
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Quaternary [Obsolete Code: Use Q]
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Ionian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Tarantian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 0
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Anglian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 0
age value uncertainty: 0
age determination: QUAT
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Beestonian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Cromerian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Devensian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 0
age value uncertainty: 0
age determination: QUAT
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Dimlington Stadial
type: Concept
in scheme: A boundary between geological divisons of time
age value: 0
age value uncertainty: 0
age determination: QUAT
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Loch Lomond Stadial (Younger Dryas)
type: Concept
in scheme: A boundary between geological divisons of time
age value: 0
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Windermere Interstadial
type: Concept
in scheme: A boundary between geological divisons of time
age value: 0
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Baventian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Holocene
type: Concept
in scheme: A boundary between geological divisons of time
age value: 0
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Ipswichian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 0
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Ludhamian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 1
type: Concept
in scheme: A boundary between geological divisons of time
age value: 0
age value uncertainty: 0
age determination: QUAT
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 2
type: Concept
in scheme: A boundary between geological divisons of time
age value: 0
age value uncertainty: 0
age determination: QUAT
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 4
type: Concept
in scheme: A boundary between geological divisons of time
age value: 0
age value uncertainty: 0
age determination: QUAT
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 5a
type: Concept
in scheme: A boundary between geological divisons of time
age value: 0
age value uncertainty: 0
age determination: QUAT
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 5b
type: Concept
in scheme: A boundary between geological divisons of time
age value: 0
age value uncertainty: 0
age determination: QUAT
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 5c
type: Concept
in scheme: A boundary between geological divisons of time
age value: 0
age value uncertainty: 0
age determination: QUAT
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 6
type: Concept
in scheme: A boundary between geological divisons of time
age value: 0
age value uncertainty: 0
age determination: QUAT
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 7
type: Concept
in scheme: A boundary between geological divisons of time
age value: 0
age value uncertainty: 0
age determination: QUAT
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 8
type: Concept
in scheme: A boundary between geological divisons of time
age value: 0
age value uncertainty: 0
age determination: QUAT
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 9
type: Concept
in scheme: A boundary between geological divisons of time
age value: 0
age value uncertainty: 0
age determination: QUAT
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 13
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 14
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 15
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 16
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 17
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 18
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 20
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 22
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 23
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 24
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 25
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 26
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 27
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 28
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 29
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 30
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 31
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 32
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 33
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 34
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 35
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 36
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 37
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 39
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 40
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 41
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 42
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 43
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 44
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 45
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 46
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 47
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 48
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 49
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 50
type: Concept
in scheme: A boundary between geological divisons of time
age value: 1
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 51
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 52
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 53
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 54
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 56
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 57
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 58
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 59
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 60
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 61
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 62
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 63
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 65
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 66
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 67
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 68
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 69
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 71
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 72
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 73
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 74
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 75
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 77
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 78
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 79
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 80
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 81
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 82
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 83
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 84
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 85
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 86
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 87
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 88
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 90
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 91
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 92
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 93
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 94
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 96
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 97
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 98
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 99
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 101
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Marine Isotope Stage 102
type: Concept
in scheme: A boundary between geological divisons of time
age value: 3
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Antian/Bramertonian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Wolstonian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 0
age value uncertainty: 0
age determination: QUAT
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Thurnian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Pre-Pastonian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 2
age value uncertainty: 0
age determination: INTERP
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Hoxnian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 0
age value uncertainty: 0
age determination: QUAT
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Late Palaeozoic
type: Concept
in scheme: A boundary between geological divisons of time
age value: 416
age value uncertainty: 3
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Silurian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 444
age value uncertainty: 2
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Aeronian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 439
age value uncertainty: 2
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Ludfordian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 421
age value uncertainty: 3
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Homerian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 426
age value uncertainty: 2
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Pridoli
type: Concept
in scheme: A boundary between geological divisons of time
age value: 419
age value uncertainty: 3
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Telychian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 436
age value uncertainty: 2
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Ludlow
type: Concept
in scheme: A boundary between geological divisons of time
age value: 423
age value uncertainty: 3
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Wenlock
type: Concept
in scheme: A boundary between geological divisons of time
age value: 428
age value uncertainty: 2
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Ladinian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 237
age value uncertainty: 2
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Mid Triassic
type: Concept
in scheme: A boundary between geological divisons of time
age value: 246
age value uncertainty: 0
age determination: APPROX
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Norian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 217
age value uncertainty: 2
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Olenekian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 250
age value uncertainty: 0
age determination: APPROX
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Rhaetian
type: Concept
in scheme: A boundary between geological divisons of time
age value: 204
age value uncertainty: 2
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Base Late Triassic
type: Concept
in scheme: A boundary between geological divisons of time
age value: 229
age value uncertainty: 0
age determination: APPROX
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.

Present Day
type: Concept
in scheme: A boundary between geological divisons of time
age value: 0
age value uncertainty: 0
age determination: DEFINITE
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.