Subject ASC00012to
The Quarterly journal of the Geological Society of London.
v.50 (1894), Page 574 (1894)
Smithsonian Libraries
BHL Page 39089376
Keywords
geological section Wales Builth Pen-cerig House Llandeilo Shales diabase section road-cutting geology road cutting shale Pen-cerig house shales road Road-cutting back of Pen-cerig House Road Pen-cerig rock ground layer