. . . "DPL"@en . "stable"@en . . "Limestone. Stratified bedrock. Occurs onshore. Deposited during the Asbian Substage (Carboniferous Period) (337-330.9 Ma BP)."@en . "Dunkpool Limestone"@en . "330.9"^^ . "Limestone."@en . . . . "337.0"^^ . "Dunkpool Limestone"@en . .