. . "Coal. Stratified bedrock. Occurs onshore. Deposited during the Langsettian Substage (Carboniferous Period) (319-318 Ma BP)."@en . "Bone Coal (South Lancashire)"@en . "stable"@en . . "Bone Coal (South Lancashire)"@en . . . . "BNEC"@en . "318.0"^^ . . "Coal."@en . "319.0"^^ . .