Subject ASC0000zxa
The Quarterly journal of the Geological Society of London.
v.37 (1881), Page 43 (1881)
Smithsonian Libraries
BHL Page 43971192
Keywords
map geology schist steatite quarry plas goch Plas Goch green schist steatite schist intrusive rock magnetite serpentine Geological drawing rocks rock types quarry detail. Schist variations. Serpentine Steatite