The BGS Lexicon Of Named Rock Units.

Dataset description

The BGS Lexicon of Named Rock Units holds definitive and readily accessible information about all allostratigraphical, lithostratigraphical and lithodemic units of member (or equivalent) and higher status that are used, or have been used, on BGS maps and in BGS publications for the UK. It includes information about lesser named units, notably beds (and their equivalents), and some information about names not currently recognised by the BGS or now regarded as obsolete. Some 25% of current Lexicon entries include full definitions, in the BGS context, of formal or informal type. Detail levels in each are broadly comparable, but the informal label is applied if definitions do not yet meet all the criteria of modern stratigraphical procedures. Full Lexicon entries include details of rock unit name, unique computer code, map code, currency, rank, parent unit and parent rank, age, lithology, lower and upper boundaries, thickness, previous or alternative names, geographical extent, stratotypes, occurrence by BGS 1:50 000-scale map (with map code used) and bibliographical references. All entries carry a code describing the level of information held, ranging between full dataset and 'code-only' entries.


Freely available via the Internet. Copyright control on use.

Further information

For more information please contact:


Environmental Science Centre, Nicker Hill, Keyworth
NG12 5GG

Tel : +44 (0)115 936 3143
Fax :+44 (0)115 936 3276


Further details

Dataset details

Author(s) Not available
Principal Investigator(s) Not available
Language English
Curator British Geological Survey
Supply media/format WEB PAGES (INTERNET). - WWW Pages, query system available over WWW, producing report of individual entries.; Version:
TEXT - Text, individual qeries from the database printed on demand.; Version:
Storage format Digital:Oracle Relational Database
Frequency of update daily
Start of capture 1993
End of capture Not applicable
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
Telephone +44 (0)115 936 3143
Fax +44 (0)115 936 3276
Topic category code (ISO) geoscientificInformation (information pertaining to earth sciences)
Keyword source BGS Keyphrases
Spatial details
Spatial Reference System Not available
Dataset extent
Coverage (Lat/Long) North boundary : 60.86
East boundary  : 1.78
South boundary : 49.77
West boundary  : -8.65
Metadata language English
Metadata last updated 14th January 2010
Metadata standard compliance NERC profile of ISO19115:2003
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.