Subject ASC0003tcc
The geological magazine, or, Monthly journal of geology.
Decade 3:v. 4 (1887), Page 19 (1864)
Smithsonian Libraries
BHL Page 30751412
Keywords
blue shale bind transverse section Donisthorpe Leicestershire Coal-field cank sandstone fine-grained siliceo-ferrginous cone-in-cone cone structure shale formation mass 'cank'