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

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