"DUD"@en . "stable"@en . . . "314.75"^^ . "318.0"^^ . "Coal. Stratified bedrock. Occurs onshore. Deposited during the Duckmantian Substage (Carboniferous Period) (318-314.75 Ma BP)."@en . . . . . "Dalmellington Upper Diamond Coal"@en . "Dalmellington Upper Diamond Coal"@en . "Coal."@en . . .