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 



