"Ince Six Foot Coal (South Lancashire)"@en . "318.0"^^ . . "I6FT"@en . . "Ince Six Foot Coal (South Lancashire)"@en . "stable"@en . "Coal. Stratified bedrock. Occurs onshore. Deposited during the Duckmantian Substage (Carboniferous Period) (318-314.75 Ma BP)."@en . . . "Coal."@en . . "314.75"^^ . . . .