. "Brockwell Coal (Northumberland And Durham)"@en . "318.0"^^ . "BROC"@en . . "stable"@en . "Coal."@en . . . "319.0"^^ . . "Brockwell Coal (Northumberland And Durham)"@en . . . "Bandy In Northumberland"@en . "Coal. Stratified bedrock. Occurs onshore. Deposited during the Langsettian Substage (Carboniferous Period) (319-318 Ma BP)."@en . . .