"346.7"^^ . "[Duplicate: use BSG]"@en . "BWSF"@en . . "Bowland Shale Formation [Duplicate: use BSG]"@en . . "stable"@en . "Bowland Shale Formation"@en . . "Bowland Shale Formation [Duplicate: use BSG]"@en . . "Stratified bedrock. Occurs both onshore and offshore. Deposited during the Visean Age - to - Namurian Stage (Carboniferous Period) (346.7-319 Ma BP)."@en . "319.0"^^ . . .