. "0.0"^^ . . "Gravel and sand. Superficial deposits. Occurs onshore. Formed during the Quaternary Period (2.58-0 Ma BP)."@en . . . . . . "Sand and gravel, locally with lenses of silt, clay or peat. [Generic description]."@en . "River Terrace Deposits, 4 (Blackwater)"@en . "River Terrace Deposits, 4 (Blackwater)"@en . "BL4"@en . "2.58"^^ . "stable"@en .