"Brunton Quarry Sandstone"@en . . "314.75"^^ . . . . . "Brunton Quarry Sandstone"@en . . . "BQSA"@en . "Stratified bedrock. Occurs onshore. Deposited during the Duckmantian Substage (Carboniferous Period) (318-314.75 Ma BP)."@en . "stable"@en . . "318.0"^^ .