Subject ASC00011f7
The Quarterly journal of the Geological Society of London.
v.56 (1900), Page [390] (1900)
Smithsonian Libraries
BHL Page 41487740
Keywords
map shale map Sale exposures near Sale shale Welsh border dingle mill Wenlock shales of the welsh Borderland Zone of the Cyrtograptus Lundgreni Tarannon Shales rigidus lundgreni Ucheldre