Subject ASC00011hh
The Quarterly journal of the Geological Society of London.
v.56 (1900), Page 253 (1900)
Smithsonian Libraries
BHL Page 41487577
Keywords
dyke slickensides granophyre basalt composite composite dyke cross-section Llanfechell magma intrusive acid rock acid dyke serpentine Llyn Geirian section Geology Anglesey