. "Tan Hill Coal"@en . . . "327.0"^^ . "Holme Wood Coal"@en . "Tanhill Coal"@en . . . . "stable"@en . "HOWCO"@en . . . "Coal."@en . "323.75"^^ . "Holme Wood Coal"@en . . . "Coal. Stratified bedrock. Occurs onshore. Deposited during the Arnsbergian Substage (Carboniferous Period) (327-323.75 Ma BP)."@en .