Subject ASC00011ty
The Quarterly journal of the Geological Society of London.
v.67 (1911), Page 522 (1845)
Smithsonian Libraries
BHL Page 39749430
Keywords
sediments Gower radiolarian phase geology fossils sea deposits shale radiolaria Devon stratigraphy Culm radiolarian cherts Radiolarian shales Rottenstone Beds Millstone Grit Carmarthenshire