Subject ASC0003tc8
The geological magazine, or, Monthly journal of geology.
Decade 3:v.3 (1886), Page 570 (1886)
Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
BHL Page 32503149
Keywords
ffynnon beuno cae gwyn cave sand laminated clay bone earth pebble gravel entrance Sand Clay Laminated Clay Bone-earth Earth Cave Layers Pebbles Ffynnon Beuno Caves Cae Geyn Caves Gravel Geology Dirt Minerals Rocks Excavation Sandy Clay Bone-Earth caves Cae Gwyn Caves bone-earth layers Cae Gwyn glacier sediment layers