Subject ASC0003w56
The geologist : a popular monthly magazine of geology.
Vol.4 (1861), Page 591 (1861)
Natural History Museum Library, London
BHL Page 46207305
Keywords
Chenendopora complexa benett cretaceous formation upper greensand geology fossils fossil siliceous sponge Cretaceous chloritic marl Upper Greensand Cambridgeshire