Subject ASC0001imb
The Quarterly journal of the Geological Society of London.
v.19 (1863), Page 478 (1863)
Smithsonian Libraries
BHL Page 35328465
Keywords
section limestone devonian Pembrokeshire North Ireland slate Devonshire South Ireland Marwood Pilton Slate Upper Old Red Sandstone Ireland Geologic Sections pembrokeshire north ireland devonshire south marwood pilton old red strata layer geology upper sand carboniferous