Rhif Archif
6438458
Disgrifiad
Figure 48. A cross-section of the lower section of Oakeley quarry (the former Palmerston quarry), illustrating the complexity of a large Ffestiniog operation in several different veins. With acknowledgement to Graham Isherwood
Enw Casgliad
WSP - Welsh Slate Publication Collection
Cyfrwng
Graphic.
Cychwynnwr
RCAHMW
Dyddiad
2014