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. Publ. by J. Arrowsmith, 24 August 1846. [Not an official publication, copied from the preceding index, item 5]. [BGS Archive Reference GSM/DC/S/3.] 
Publication year 1846 
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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