Subject ASC0001gsm
The Quarterly journal of the Geological Society of London.
v.60 (1904), (1904)
Smithsonian Libraries
BHL Page 35259867
Keywords
geology crystallography dyke Llyn Pardan Wales Geology Llyn Padarn Dyke-rocks 6 photographs of Llyn Padarn Dyke Rocks rock dyke-rocks crystal photography microscopic photo