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: Geological Maps & Plans
: Sheet 15. No. 2 Coal measures Forest of Dean
: A cross section through Coal measures in the Forest of Dean, showing the geology at surface and at depth through a line bearing S.W. to N.E. Chapel Hill to Wigpool.
: Brown, J. Barnsley: Williams, D H.
: Forest of Dean, on a line bearing south west to north east, Chapel Hill to Wigpool