# Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services, Division 4.2.3.9: Geochronologic Era (GeochronologicEraValue)

Extent: E+W+S+N.I.

Terms specifying recognised geological time units.
The allowed values for this code list comprise the values specified in Cohen, K.M., Finney, S. & Gibbard, P.L., International Chronostratigraphic Chart, August 2012 , International Commission on Stratigraphy of the International Union of Geological Sciences, 2012 and additional values at any level defined by data providers.
Data providers may use the additional values for Pre-Cambrian rocks and Quaternary units specified in the INSPIRE Technical Guidance document on Geology.

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Source: https://www.legislation.gov.uk/eur/2010/1089/annex/III/division/4/division/4.2/division/4.2.3/division/4.2.3.9 (the official version)
Page: https://openlegislation.uk/eu-regulation-2010-1089/annex-III/division-4/division-4.2/division-4.2.3/division-4.2.3.9
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.