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Fig. 1. Frost heaving in chalk at Saffron Walden, February 1947. The black fissures are solid ice; all the white chalk fragments were originally in close contact with each other. Many fragments have been fractured during the frost
British Railways Photograph Copyright Reserved
Fig. 2. Wind Effects in a Railway Cutting near Barras, Westmorland
Fig. 1.Frost heaving in chalk at Saffron Walden, February 1947. The black fissures are solid ice; all the white chalk fragments were originally in close contact with each other. Many fragments have been fractured during the frost
Photograph by W. H. Ward
Fig. 2.Wind Effects in a Railway Cutting near Barras, Westmorland