Subject ASC00011hq
The Quarterly journal of the Geological Society of London.
v.56 (1900), Page 171 (1900)
Smithsonian Libraries
BHL Page 41487477
Keywords
geology quarry Wallsgrove Quarry rock layers rocks Ledbury shale Downton sandstone Aymestry limestone section cross-section shale sandstone limestone faults wallsgrove quarry ledbury downton aymestry