Subject ASC0001uwh
The Quarterly journal of the Geological Society of London.
v.36 (1880), Page 279 (1845)
Smithsonian Libraries
BHL Page 36090638
Keywords
rectory cerrigydrudion quarry tynyrhydd millpond tanygraig bala shale grit ripple false clay corwen leaden black pyritous graptolite mudstone green cleave tarannon cross-section beds Cerrigydrudion Rectory Tynyrhydd Millpond Tanygraig Bala shales Tarannon mustones Corwen Grits mountains location area hills Cambrian greybalashales graptolitic