Digital Geochronological Index
Dataset description
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 (1995); Proterozoic after Cowie and Bassett (1989); Archaean after an unpublished decision of the Precambrian Subcommission of the IUGS.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.
Constraints
Use must be acknowledged.
Further information
For more information please contact:
Enquiries
British Geological Survey
Environmental Science Centre, Nicker Hill,
Keyworth
Nottingham
NG12 5GG
Tel : +44 (0)115 936 3143
Fax :+44 (0)115 936 3276
Email :enquiries@bgs.ac.uk
Further details
Dataset details
| Language | English |
|---|---|
| Curator | British Geological Survey |
| Supply media/format | ORACLE - Used as a domain constraint on corporate data tables |
| Storage format | Digital:Oracle Relational Database |
| Frequency of update | not planned |
| Start of capture | 25th January 2002 |
| End of capture | Not known |
| Contact details | |
| Department | Enquiries |
| Organisation | British Geological Survey |
| Address | Environmental Science Centre, Nicker Hill, Keyworth |
| City | Nottingham |
| County | Nottinghamshire |
| Country | United Kingdom |
| Postcode | NG12 5GG |
| enquiries@bgs.ac.uk | |
| Telephone | +44 (0)115 936 3143 |
| Fax | +44 (0)115 936 3276 |
| Keywords | |
| Topic category | geoscientificInformation (information pertaining to earth sciences) |
| Keywords and Keyphrases | GEOCHRONOLOGY
STRATIGRAPHY |
| Keyword source | BGS Keyphrases |
| Spatial details | |
| Spatial Reference System | Not available |
| Dataset extent | |
| Coverage (Lat/Long) | North boundary : 90 East boundary : 180 South boundary : -90 West boundary : -180 |
| Metadata | |
| Metadata language | English |
| Metadata last updated | 24th July 2008 |
| Metadata standard | ISO standard 19115:2003 |
| Copyright and IPR | |
| 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. | |
| W -180 | 90 N |
 |
|
| S -90 | 180 E |
