Digital geochronological index

A digital geochronological index to act as a domain constraint for geochronology columns in corporate data tables. It decodes geochronology codes, models pseudo parent-child relationships between intervals (for example, find the epochs within a given period), allows range searches (for example, find the epochs between lower limiting and upper limiting epochs) and provides radiometric ages with ranges of uncertainty. Follows the recommendations of the BGS Stratigraphy Committee. Phanerozoic after Gradstein and Ogg (1996), with the Ordovician scheme of Fortey et al. (1995); Proterozoic after Cowie and Bassett (1989); Archaean after an unpublished decision of the Precambrian Subcommission of the IUGS. Covers the whole of geological time. Geochronological resolution usually to age level. Lower resolution in the Archaean, Proterozoic, Cambrian. Greater resolution in the Caradoc Epoch.

Date (Creation): 2002-01-25

Citation identifier: http://data.bgs.ac.uk/id/dataHolding/13480463

Point of contact

Organisation name	Individual name	Electronic mail address	Role
British Geological Survey	Enquiries	enquiries@bgs.ac.uk	Distributor
British Geological Survey	Enquiries	enquiries@bgs.ac.uk	Originator
British Geological Survey	Enquiries	enquiries@bgs.ac.uk	Point of contact
British Geological Survey	Enquiries	enquiries@bgs.ac.uk	Custodian

Maintenance and update frequency: Not planned

GEMET - INSPIRE themes, version 1.0

Geology

BGS Thesaurus of Geosciences

Geochronology
data.gov.uk (non-INSPIRE)
Stratigraphy

dataCentre

data.gov.uk (non-INSPIRE)

Keywords

NERC_DDC

Access constraints: Other restrictions

Other constraints: Use must be acknowledged.

Use constraints: Other restrictions

Other constraints: The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused.

Other constraints: Either: (i) the dataset is made freely available, e.g. via the Internet, for a restricted category of use (e.g. educational use only); or (ii) the dataset has not been formally approved by BGS for access and use by external clients under licence, but its use may be permitted under alternative formal arrangements; or (iii) the dataset contains 3rd party data or information obtained by BGS under terms and conditions that must be consulted in order to determine the permitted usage of the dataset. Refer to the BGS staff member responsible for the creation of the dataset if further advice is required. He / she should be familiar with the composition of the dataset, particularly with regard to 3rd party IPR contained in it, and any resultant use restrictions. This staff member should revert to the IPR Section ( ipr@bgs.ac.uk) for advice, should the position not be clear.

Language: English

Topic category

Geoscientific information

End date: 2014-01 Before

Supplemental Information: Is a corporate dictionary and as such should not be altered. BGS Geological Timechart Cowie, J W. and Bassett, M G. 1989. International Union of Geological Sciences 1989 Global Stratigraphic Chart with geochronometric and magnetostratigraphic calibration. Supplement to Episodes, Vol. 12, No. 2. Fortey, R A, Harper, D A T, Ingham, J K, Owen, A W and Rushton, A W A. 1995. A revision of Ordovician series and stages from the historical type area. Geological Magazine, Vol., 132, 15-30. Gradstein, F M, and Ogg, J. 1996. A Phanerozoic time scale. Episodes, Vol.19, 3-5.Logically consistent single geochronological scheme.

Reference System Information

No information provided.

Distribution format

Name	Version
ORACLE - Used as a domain constraint on corporate data tables

Distributor contact

Organisation name	Individual name	Electronic mail address	Role
British Geological Survey	Enquiries	enquiries@bgs.ac.uk	Distributor

OnLine resource

Protocol	Linkage	Name
	http://www.bgs.ac.uk/discoveringGeology/time/timechart/home.html?src=topNav	BGS Geological Timechart

OnLine resource

Protocol	Linkage	Name
	http://www.bgs.ac.uk/enquiries/home.html?src=topNav	BGS Enquiries

Hierarchy level: Non geographic dataset

Other: non geographic dataset

Conformance result

Title: INSPIRE Implementing rules laying down technical arrangements for the interoperability and harmonisation of Geology

Date (Publication): 2011

Explanation: See the referenced specification

Pass: No

Conformance result

Title: 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

Date (Publication): 2010-12-08

Explanation: See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF

Pass: No

Statement: Developed from the pre-existing DIC_CHRONOSTRAT, parts of which had become obsolete. The development followed the recommendations of the BGS Stratigraphy Committee. DIC_CHRONOSTRAT was itself developed from a pre-existing digital chronostratigraphical index which formed segment CSCO of BGS.DIC.