Subject ASC0001dvv
The Quarterly journal of the Geological Society of London.
v.49 (1893), Page 430 (1893)
Natural History Museum Library, London
BHL Page 45959070
Keywords
diagrams of sections of rock geological diagram section map Wales diagrammatic section geology diagram Llandovery Beds Corwen faultsNant Cawrddu engraved diagram landscape geography cross-section rocks cross section east of Ty-isaf north slope Berwyn Hills grit bands folds anticlinals dips synclinal faults Ty-isaf fault bala beds Berwyn hills hills