Subject ASC0003tee
The geological magazine, or, Monthly journal of geology.
Decade 3:v. 7 (1890), Page 107 (1890)
Smithsonian Libraries
BHL Page 30522071
Keywords
culm measures Efford Ditch Bude North Cornwall geology Culm measures landscape cross section rock layers rock strata plate tectonics fold fault rift earth movement form formation rock geological stratum strata layers fracture tectonics culm-measures Cornwall culm