"Coal. Stratified bedrock. Occurs onshore. Deposited during the Pendleian Substage (Carboniferous Period) (330.3-327 Ma BP)."@en . "Douglas Smithy Coal"@en . . . "327.0"^^ . . . "330.3"^^ . "DGSM"@en . "stable"@en . "Douglas Smithy Coal"@en . "Coalburn Smithy Coal"@en . . . . "Coal."@en . . .