Subject ASC0003s7c
The geological magazine, or, Monthly journal of geology.
[Decade 1]:v. 2 (1865), Page 232 (1865)
Smithsonian Libraries
BHL Page 30540626
Keywords
Line diagram River Colne pit rainwater percolation well subterranean reservoir gravel London clay chalk Gravel Erosion Clay layer strata formation london clay erosion soil debris rock colne yorkshire Cyclopteria