"318.0"^^ . . "Bottom Moorland Coal (Northumberland)"@en . . "Bottom Moorland Coal (Northumberland)"@en . "stable"@en . . "Coal. Stratified bedrock. Occurs onshore. Deposited during the Duckmantian Substage (Carboniferous Period) (318-314.75 Ma BP)."@en . . . . "Coal."@en . "BMOR"@en . . . "314.75"^^ .