Subject ASC00012vg
The Quarterly journal of the Geological Society of London.
v.50 (1894), Page 681 (1894)
Smithsonian Libraries
BHL Page 39089509
Keywords
siliceous rock sponge-spicules transverse section glauconite-grains quartz cross-section geology Microscopic rocks microscopic view sponge clay rock siliceous Chapman Surrey surrey section