. "Sandstone."@en . . . "318.0"^^ . "Sandstone. Stratified bedrock. Occurs onshore. Deposited during the Langsettian Substage (Carboniferous Period) (319-318 Ma BP)."@en . "stable"@en . . "CWST"@en . . . "Crow Sandstone"@en . . . "Crow Sandstone"@en . "319.0"^^ .