Subject ASC0001gvk
The Quarterly journal of the Geological Society of London.
v.60 (1904), Page 104 (1904)
Smithsonian Libraries
BHL Page 35259534
Keywords
rocks Borrowdale volcanic garnet plagioclase-ring biotite orthoclase quarts felspar chlorite Armboth ash Falcon-Crag magnification microscopic views volcanic rocks f.h.michael deletlith Borrowdale volcanic series geology F.H.Michael Mintern Bros.imp.