. . "Coal. Stratified bedrock. Occurs onshore. Deposited during the Duckmantian Substage (Carboniferous Period) (318-314.75 Ma BP)."@en . "DAU"@en . . "Daugh Coal (Sanquhar)"@en . . "Daugh Coal (Sanquhar)"@en . . "stable"@en . "318.0"^^ . . . . "314.75"^^ . "Coal."@en .