Subject ASC0001163
The Quarterly journal of the Geological Society of London.
v.56 (1900), Page 436 (1900)
Smithsonian Libraries
BHL Page 41487788
Keywords
section: aberedw hill geology cross-section quarry fossils shales graptolites stream course brachiopods Aberdw Hill Tremaen Quarry Penwaun Pool mudstones calcareous bands hill formation