Subject ASC0001g0d
The Quarterly journal of the Geological Society of London.
v.28 (1872), Page 455 (1872)
Smithsonian Libraries
BHL Page 34985506
Keywords
section gravel bed Chaucer Road Soil gravel minerals London-clay. ThamesValley. high-terrace gravel soil brick-earth white sand sandy clay clay flint London Clay soil horizons geology geography seam sand flakes diagram ground work