"Coal. Stratified bedrock. Occurs onshore. Deposited during the Langsettian Substage (Carboniferous Period) (319-318 Ma BP)."@en . "CRML"@en . . "Cromhall Coal (Bristol Area)"@en . . "stable"@en . . "Coal."@en . "318.0"^^ . "Cromhall Coal (Bristol Area)"@en . "319.0"^^ . . . . . .