Subject ASC000103u
The Quarterly journal of the Geological Society of London.
v.58 (1902), Page [242] (1902)
Smithsonian Libraries
BHL Page 41675679
Keywords
rhyolite Clogher nodulaR RHYOLITE CLOGHER HEAD FOSSILIFEROUS SILURIAN C(7) Rhyolite Surface modular rhyolite hammer volcanic rock geology rock