"318.0"^^ . . "DGN"@en . "Coal."@en . . . . "Douglas Nine Foot Coal"@en . . . "Douglas Nine Foot Coal"@en . "319.0"^^ . "stable"@en . "Coal. Stratified bedrock. Occurs onshore. Deposited during the Langsettian Substage (Carboniferous Period) (319-318 Ma BP)."@en . . .