. "Coal."@en . . . "319.0"^^ . "Bays Leap Coal (Northumberland and Durham)"@en . . "BAYL"@en . . "318.0"^^ . "Coal. Stratified bedrock. Occurs onshore. Deposited during the Langsettian Substage (Carboniferous Period) (319-318 Ma BP)."@en . . "Bays Leap Coal (Northumberland and Durham)"@en . . . "Top Victoria Coal (Northumberland And Durham)"@en . "stable"@en . .