. . "stable"@en . . "Chalk gravel in a fine-grained chalk clay matrix, with flint pebbles; commonly overlain by a metre of pale brown silty chalky loam; waterlain. [Generic description: 1:50 k map margins]."@en . "Clay and gravel with subsidiary pebbly clay. Stratified superficial deposits. Occurs onshore. Formed during the Quaternary Period (2.58-0 Ma BP)."@en . "Combe Sand and Gravel Member"@en . . . . "0.0"^^ . "CMBE"@en . "Combe Sand and Gravel Member"@en . . "2.58"^^ . .