. "Crofthead Coal"@en . . . "Coal."@en . . "319.0"^^ . "Colinburn Coal (Central Coalfield)"@en . . "Hollandbush Smithy Coal"@en . "Highstone Coal"@en . . . "Coal. Stratified bedrock. Occurs onshore. Deposited during the Langsettian Substage (Carboniferous Period) (319-318 Ma BP)."@en . . "CN"@en . . . . "318.0"^^ . "Colinburn Coal (Central Coalfield)"@en . "stable"@en .