Map record details

Map series Index to colours used on geological maps 
Sheet title Index to the colours and signs employed in the maps and sections of the Geological Survey of Great Britain, up to 1869. [BGS Archive Reference GSM/DC/S/3.] 
Publication year 1869 
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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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