QuartJourn.Ceol SocVol.XLVIll PI VI. 



Map Illustrating the Sequence of the 



"Cambrian" Rocks of Caernarvonshire. 



I Silurian. V/y//^ Banded Slates. 



tPost ' Cambrian. xMlikBangor Conglomerate. 



D? D9 C/inyloinerate ^^^Bcutgor Brecciw. 



^^mPurpleSkUes. ^^MLaminated 6rUs. 



^^ ■ ' ' ■ ] S-^""^ ^''i^- ^^MTairr/ynwtt, mid BrltMir Confflcmerate,. 



W.-f'--^-.'^ Rhixf - we*v Grit [L^f^FelsU^. 



Fig./ 



