"stable"@en . "323.75"^^ . "CFLD"@en . "Coal. Stratified bedrock. Occurs onshore. Deposited during the Arnsbergian Substage (Carboniferous Period) (327-323.75 Ma BP)."@en . . "Coal."@en . "Clintsfield Coal"@en . "327.0"^^ . . . . "Clintsfield Coal"@en . . . . .