Subject ASC0003sd1
The geological magazine, or, Monthly journal of geology.
[Decade 1]:v. 7 (1870), Page 70 (1870)
Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
BHL Page 32580425
Keywords
Geological diagram section showing junction of Millstone Grit with Carboniferous Limestone at Carreg-y-big Millstone Grit of North Wales canyon geology limestone clay quarry Millstone Grit North Wales Carboniferous Limestone dyke sandstone millstone grit