. "[Obsolete: use ACHS]"@en . . "archaic"@en . "Acer Hill Sandstone [Obsolete: use ACHS]"@en . . "322.0"^^ . . "Acer Hill Sandstone [Obsolete: use ACHS]"@en . "AHSA"@en . . "Accerhill Sandstone"@en . "Obsolete name. Sandstone. Stratified bedrock. Occurs onshore. Deposited during the Chokierian Substage - to - Alportian Substage (Carboniferous Period) (323.75-322 Ma BP)."@en . . "323.75"^^ .