Map record details

Map series Index to colours used on geological maps 
Sheet title Index to the colours & signs employed in the Geological Survey of Great Britain, for south western England & South Wales. n.d. (about 1844, see sheet 35 Jan 1845). [BGS Archive Reference GSM/DC/S/3.] 
Publication year 1845 
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This map is made available under the Open Government Licence, subject to the following acknowledgement accompanying any reproduced BGS materials: "Contains British Geological Survey materials © NERC [year]".

Hutton field: well correlation diagram.
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Hydrogeology
Small scale (non-series) maps