Subject ASC0001gfx
The Quarterly journal of the Geological Society of London.
v.10 (1854), Page 98 (1854)
Smithsonian Libraries
BHL Page 35013017
Keywords
geology Geology Park hill Croydon Park Hill London clay pebble beds Ostrea Melania Cyrena mottled clay green sand flint pebbles Thanet sands chalk London Clay Pebble beds clay sand flint bed well deposit well-sections geological society park hill croydon clay London terrain beds soil