. "D2FT"@en . . "Dalmellington Two Foot Coal"@en . "Dalmellington Two Foot Coal"@en . . . . "Coal."@en . . . . "Coal. Stratified bedrock. Occurs both onshore and offshore. Deposited during the Duckmantian Substage (Carboniferous Period) (318-314.75 Ma BP)."@en . "314.75"^^ . "stable"@en . "318.0"^^ .