. "2.58"^^ . . "stable"@en . . . "Chalky Till"@en . "0.0"^^ . "Pebbly clay, rich in chalk clasts, locally with lenses of sand and gravel. [Generic description]."@en . "Chalk and diamictite. Superficial deposits. Occurs onshore. Formed during the Quaternary Period (2.58-0 Ma BP)."@en . "Chalky Till"@en . . . "CBC"@en .