Sumbler, M.G.. 1996 The stratigraphy of the Chalk Group in Yorkshire, Humberside and Lincolnshire. Nottingham, UK, British Geological Survey, 33pp. (WA/96/026) (Unpublished)
This report was prepared for the Hydrogeology Group of the British Geological Survey, as a contribution towards their hydrogeological memoir for the region, a contract funded by the Nation Rivers Authority. It is based primarily on published maps and accounts of the succession (see References) with some additional information (e.g. boreholes and geophysical information) from BGS archives.
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