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