| P.A. Floyd, C.S. Exley, M.T. Styles - Science - 2012 - 257 pages
This volume illustrates some of the significant aspects of magmatic activity from Devonian (408 million years ago) to early Permian (270 million years ago) times in SW England ... | |
| E. B. Selwood - Camelford (England) - 1998 - 144 pages
A detailed account of the geology shown on the complementary 1: 50 000 (or earlier 1: 63 360) geological map(s) | |
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