. "Dryden Limestone"@en . . . "Dryden Limestone"@en . "330.9"^^ . . "330.3"^^ . "Limestone."@en . . . "Limestone. Stratified bedrock. Occurs onshore. Deposited during the Brigantian Substage (Carboniferous Period) (330.9-330.3 Ma BP)."@en . "stable"@en . "DRYL"@en . .