A revised scheme for coding unlithified deposits (also applicable to engineering soils)

Cooper, A.H.; Kessler, H.; Ford, J.. 2006 A revised scheme for coding unlithified deposits (also applicable to engineering soils). British Geological Survey, 45pp. (IR/05/123) (Unpublished)

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This report details the reasoning and methodology for the introduction of a revised computer-coding scheme for unlithified deposits, commonly also referred to as superficial deposits, unconsolidated deposits or engineering soils. These include clay, silt, sand, gravel, cobbles, boulders and peat plus all the combinations of these deposits. The report describes the former BGS system for coding such deposits and details a logical system for coding many hundreds of lithological mixtures by the simple use of up to seven letters in various combinations. The scheme is designed to be universal in its application and usable for historical and modern geological information including field data capture. It is not a classification scheme, but a coding scheme, furthermore it is not intended as a replacement for a full lithological description. The report details the implications on this coding scheme of using BS5930 and the AGS (Association of Geotechnical and Geoenvironmental Specialists) borehole recording classifications. It also details how the coding scheme can be applied to other classification schemes including IMAU (Industrial Mineral Assessment Unit) and material recorded by offshore and coastal studies.The report presents an abridged listing of the proposed codes based on the most commonly encountered combinations and the lithological ornament fields currently used in AGS borehole packages.The report also lists a much simplified set of codes for colouring borehole sections and maps using GIS and borehole viewing software where it is desirable to have the detail in the borehole logs, but generalisation is needed for correlation and presentation.

Item Type: Publication - Report
Programmes: BGS Programmes > National Geoscience Framework
Funders/Sponsors: British Geological Survey
Additional Information. Not used in RCUK Gateway to Research.: This report has been internally reviewed by numerous BGS geologists and forms the basis for the coding scheme that is used for borehole coding and other recording. The codes can be searched at and are all included in the "Unlithified Deposits Coding Scheme"
NORA Subject Terms: Marine Sciences
Computer Science
Agriculture and Soil Science
Ecology and Environment
Earth Sciences
Data and Information
Date made live: 29 Jan 2010 08:23 +0 (UTC)

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