. "Bradford Threequarters Coal (South Lancashire)"@en . "Coal. Stratified bedrock. Occurs onshore. Deposited during the Bolsovian Substage (Carboniferous Period) (314.75-310 Ma BP)."@en . "Bradford Threequarters Mine Coal [Obsolete: use B3QC]"@en . "stable"@en . "Bradford Threequarters Coal (South Lancashire)"@en . . "310.0"^^ . . . . "314.75"^^ . "B3QC"@en . . . "Coal."@en . . .