Subject ASC0001dkz
The Quarterly journal of the Geological Society of London.
v.49 (1893), Page 410 (1893)
Natural History Museum Library, London
BHL Page 45959050
Keywords
slide Crystalline schists malvern hills minerals sericite gneiss quarts mineral microscope rock schist gneiss sericite quartz feldspar geology malvern quartz-felspar