"310.0"^^ . . "Coal."@en . "JNAH"@en . . . . . . "Coal. Stratified bedrock. Occurs onshore. Deposited during the Bolsovian Substage (Carboniferous Period) (314.75-310 Ma BP)."@en . "314.75"^^ . . "Jonah Coal (South Wales)"@en . . "stable"@en . "Jonah Coal (South Wales)"@en .