Subject ASC0001hjr
The Quarterly journal of the Geological Society of London.
v.5 (1849), Page 118 (1849)
Smithsonian Libraries
BHL Page 35268760
Keywords
geology fossils slate limestone quarry Calcereous Slate cleaving Bickington Devon Brathay Ambleside cleavage-planes bedding black calcareous slate Bickington limestone quarry North Devon Brathay flagstone quarry near Ambleside ridges parallel to cleavage graph planes rock bed