"Coal. Stratified bedrock. Occurs onshore. Deposited during the Asturian Substage (Carboniferous Period) (310-307.5 Ma BP)."@en . . . . "CE2C"@en . "310.0"^^ . . "Cille No.2 Coal (South Wales)"@en . "307.5"^^ . "stable"@en . . . "Coal."@en . "Cille No.2 Coal (South Wales)"@en . . .