BGS Geochronology
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.
type: ConceptScheme
creator: foaf.rdf
publisher: foaf.rdf
created: 2011-02-10
see also: http://www.bgs.ac.uk/discoveringGeology/time/home.html
see also: http://www.bgs.ac.uk/discoveringGeology/time/Timechart/home.html
see also: http://www.bgs.ac.uk/downloads/browse.cfm
see also: http://www.bgs.ac.uk/discoveringGeology/time/timeline/home.html

age determination type
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.
type: Property
comment: A property that describes the method by which the age has been determined

BGS Geological Time Boundary Age Determination Types
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.
publisher: foaf.rdf
creator: foaf.rdf
type: ConceptScheme
created: 2011-02-10
label: How a particular geological age was determined
description: Classifies dated geological events according to the authoritative reference for the dating, or by other methods used

years before present
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.
type: Property
comment: A property that provides an age value in years before present

uncertainty (years)
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.
type: Property
comment: A property that provides the uncertainty on an age value in years

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

This schema defines named divisions of geological 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.
title: BGS Geological Time Divisions
description: Geological time is divided into useful segments that are then further sub-divided. A well known example is the Jurassic, which is a Period, part of the (much longer) Mezosoic Era. The Jurassic Period is sub-divided into the Early, Mid and Late Jurassic Epochs. Some Eras are divided into sub-eras, similarly, Periods, Epochs and Ages can have sub-divisions.
creator: foaf.rdf
publisher: foaf.rdf
has top concept: XX
type: ConceptScheme
created: 2011-02-10
modified: 2010-02-12

An Ordered List of divisions 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.
type: OrderedCollection
creator: foaf.rdf
publisher: foaf.rdf

minimum age
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.
type: Property
range: Resource
comment: A property linking to the latest date (ie minimum age) of a geological time division.

rank
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.
type: Property
range: Resource
comment: This property indicates the rank of the geological time division that it describes

previous division
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.
type: Property
range: Resource
comment: This property links a geological division of time to the older division of the same rank so that it it is possible to put each time division in the correct order

BGS Geological Time Division Ranks
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.
label: The rank of a geochronological division specifies how large it is and what sort of sub-divisions it contains.
description: Geologists label divisions of geological time with named ranks which indicate which level of the hierarchy of terms they belong to. The preferred labels in this scheme are the chronological rank names; the equivalent stratigraphical rank name is provided as an alternative label.
creator: foaf.rdf
publisher: foaf.rdf
type: ConceptScheme
created: 2011-02-10

in ordered list
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.
type: Property
range: OrderedCollection
comment: This property links the name of a rank - a level of geological time division - to the ordered list of ranks that it is contained in. Ranks are ordered from the largest division level to the smallest.

An Ordered List of BGS Geochronostratigraphy ranks
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.
type: OrderedCollection
creator: foaf.rdf
publisher: foaf.rdf
rank list: http://data.bgs.ac.uk/id/Geochronology/Rank/AGE http://data.bgs.ac.uk/id/Geochronology/Rank/EON http://data.bgs.ac.uk/id/Geochronology/Rank/EPOCH http://data.bgs.ac.uk/id/Geochronology/Rank/ERA http://data.bgs.ac.uk/id/Geochronology/Rank/MIS http://data.bgs.ac.uk/id/Geochronology/Rank/PERIOD http://data.bgs.ac.uk/id/Geochronology/Rank/SUB-AGE http://data.bgs.ac.uk/id/Geochronology/Rank/SUB-EPOCH http://data.bgs.ac.uk/id/Geochronology/Rank/SUB-ERA http://data.bgs.ac.uk/id/Geochronology/Rank/SUB-PERIOD

Geochronological scheme
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS 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
type: ConceptScheme
title: A system by which geochronological divisions are defined

maximum age
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.
type: Property
range: Resource
comment: A property linking to the earliest date (ie maximum age) of a geological time division

subdivisions
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.
comment: Geological time is divided into multiple levels of sub-division. This property links a given division to an ordered lists of its immediate child divisions.
type: Property
range: OrderedCollection

next division
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.
comment: This property links a geological division of time to the younger one of the same rank so that it it is possible to put each time division in the correct order
type: Property
range: Resource