Subject ASC0001dru
The Quarterly journal of the Geological Society of London.
v.49 (1893), Page 429 (1893)
Natural History Museum Library, London
BHL Page 45959069
Keywords
lake geology Corwan Llandovery fault Fig 1 Geological Section Nant Llechog Bala Beds Corwen Grit Grey Slates Fault Fig 2 Corwen old Corwen Waterworks Grey Slate Fault Wales section slates chart waterwork sea level scale