. . "Armadale Stinking Coal"@en . . . "Coal. Stratified bedrock. Occurs onshore. Deposited during the Langsettian Substage (Carboniferous Period) (319-318 Ma BP)."@en . . "ARST"@en . . . "stable"@en . "318.0"^^ . . "Armadale Stinking Coal"@en . "Coal."@en . "319.0"^^ .