"Bedminster Toad Coal (Bristol Area)"@en . "314.75"^^ . . . . . . . "stable"@en . "Coal."@en . "318.0"^^ . . "Coal. Stratified bedrock. Occurs onshore. Deposited during the Duckmantian Substage (Carboniferous Period) (318-314.75 Ma BP)."@en . "BETD"@en . "Bedminster Toad Coal (Bristol Area)"@en .