Subject ASC0001dxs
The Quarterly journal of the Geological Society of London.
v.43 (1887), Page 315 (1887)
Natural History Museum Library, London
BHL Page 45996562
Keywords
Roscoff older rocks gneiss fine-grained granite dark porphyritic granite Quartz-feldespar #geologic formation Gneiss granite porphyritie Quartz-felspar layers fine grained granite phyritic granite quartz-feldspar grain