This generalised digital geological data is based on our 1:250 000-scale, bedrock-only maps. Data and lithostratigraphic re-classifications are derived from maps published between 1977 and 1993.
BGS·SIGMA is an integrated toolkit for digital geological mapping, enabling the assembly, capture, interrogation and visualisation of geological information.
BGS and the GSNI have carried out two major projects to examine the chemical composition of stream sediment, stream water and soil samples.
Water companies manage extensive networks of pipes for water supply and sewerage and over time, these pipes can fail, resulting in leakage to the surrounding soils.
Major transport projects create and utilise excavated materials to create underpinning infrastructure (in the form of tunnels, cuttings and embankments).
Recently there has been a trend towards the collection of ever-more quantitative data, as exemplified by the Tellus projects.
This product has now been superseded by the GeoClimate Shrink-swell dataset.
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