Sinkholes are hollows that are the result of some kind of collapse of an underlying layer of rock.
The BGS geological timechart provides colourful reference material for use in schools, colleges and at home.
A standard software interface offering data access or data processing services between computers or computer programs.
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Total organic carbon is a measure of the weight per cent of organic carbon within hydrocarbon source rocks. This dataset is derived from borehole analysis.
Accessing maps and downloading data, scans, photos and other information via BGS's free OpenGeoscience service.
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