Subject ASC0001gyy
The Quarterly journal of the Geological Society of London.
v.60 (1904), Page 71 (1904)
Smithsonian Libraries
BHL Page 35259501
Keywords
NNW Blea Crag Langstrath diagram/map exposure rock Blea Crag Langstrath fine-grained porphyritic felspars map rock exposure geology diagrammatic sketch north-north-west black coarse pink same dark-green greenish-white