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WESTERN SECTION BASED ON THE INDEX MAPS OF THE GEOLOGICAL SURVEY EXPLANATION OT (HJLOITHING Sattd Alluvium PLIOCENE St-ErOl Bed DEVONIAN! DevitttiiiJL Ri'il S SILURIAN I f Upper Silui'ian Me.tamnrplu,-j[HornUr.ndf " 1 and. Mimt-fous Schists etc.) dreenstone ( Uiabasf-. f.pidiorite Gabbrp Elvan. Dvlees (rrartite
- TORIA HISTORY OF THE
- COUNTIES OF ENGLAND
