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

Age
type: Concept
in scheme: BGS Geological Time Division Ranks
rank in ordered list: RankList
has current status: CURRENT
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.
alternative label: Stage
definition: A sub-division of a Sub-epoch.

Eon
type: Concept
in scheme: BGS Geological Time Division Ranks
rank in ordered list: RankList
has current status: CURRENT
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.
alternative label: Eonothem
definition: The largest division of geological time, measured in hundreds or thousands of millions of years.
alternative label: Aeon

Epoch
type: Concept
in scheme: BGS Geological Time Division Ranks
rank in ordered list: RankList
has current status: CURRENT
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.
alternative label: Series
definition: A sub-division of a Sub-period.

Era
type: Concept
in scheme: BGS Geological Time Division Ranks
rank in ordered list: RankList
has current status: CURRENT
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.
alternative label: Erathem
definition: A sub-division of an Eon. Typically measured in tens of millions years.

Marine Isotope Stage
type: Concept
in scheme: BGS Geological Time Division Ranks
rank in ordered list: RankList
has current status: CURRENT
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.
definition: A fine subdivision of the Quaternary Period. There are over 100 recognised marine isotope stages.

Period
type: Concept
in scheme: BGS Geological Time Division Ranks
rank in ordered list: RankList
has current status: CURRENT
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.
alternative label: System
definition: A sub-division of a Sub-era.

Sub-Age
type: Concept
in scheme: BGS Geological Time Division Ranks
rank in ordered list: RankList
has current status: CURRENT
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.
alternative label: Sub-Stage
definition: A sub-division of an Age.

Sub-Epoch
type: Concept
in scheme: BGS Geological Time Division Ranks
rank in ordered list: RankList
has current status: CURRENT
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.
alternative label: Sub-Series
definition: A sub-division of an Epoch.

Sub-Era
type: Concept
in scheme: BGS Geological Time Division Ranks
rank in ordered list: RankList
has current status: CURRENT
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.
alternative label: Sub-Erathem
definition: A sub-division of an Era.

Sub-Period
type: Concept
in scheme: BGS Geological Time Division Ranks
rank in ordered list: RankList
has current status: CURRENT
access rights: The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.
alternative label: Sub-System
definition: A sub-division of a Period.