Geologic map of Wales and south-west England
Map is based on:

British Geological Survey; 2005: Bedrock geology UK South, 1:625 000 scale (5th ed.), HarperCollins Publishers Ltd.
Jackson, A.A.; 2005: Bedrock geology UK South, an explanation of the bedrock geology map of England and Wales - 1:625 000 fifth edition, British Geological Survey, Keyworth/Nottingham.
Holland, C.H. &amp; Sanders, I.; 2009 (2nd ed.): The Geology of Ireland, Dunedin Academic Press, Edinburgh, ISBN: 9781903765722.
This file was derived from: Geologic map Wales &amp; SW England EN.svg:
Woudloper, Rowanwindwhistler