. . . "Ibrox Coal (Glasgow)"@en . . . "Coal. Stratified bedrock. Occurs onshore. Deposited during the Pendleian Substage (Carboniferous Period) (330.3-327 Ma BP)."@en . . . "327.0"^^ . "330.3"^^ . "stable"@en . "IBBC"@en . "Ibrox Coal (Glasgow)"@en . . "Coal."@en .