﻿Section C— From Gell to Black Rock Beach (Scales: horizontal and vertical, 6 inches=i mile.) 



Quart. Journ. Geol. Soc. Vol. LXVI, PI. XVI. 



Criccieth-Portmadoc 



Ystumllyn 



CAREO \R ERYR 



Exit of Llyn Cambrian 

 Ystumllyn Rai 



Black Rock Beach 

 Mount Pleasant 



Section D.— From Careg yr Eryr to Ynys Town. (Scales: horizontal and vertical, 6 inches =1 mile.) 



S.75-W. 



CAREO YR ERYR 



Older Dolerite 



Portb yr hirfaen 



N.75.E.|N.85.W. 



Gist Gerlg 

 Tyddya engan U.D. Boundary 



Beudy Pencerbi 



Tyddyn Llwyn 

 Flag Quarry 



Maentwrog Series 



PORTMADOC 



River Glaslyn 

 Tower Morfa Lodge The Park towyn 



Ffestiniog Series unguieua. Beds 



Portmadoc Flags 

 Penmorfa Beds 



