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