. "Sandstone with subsidiary mudstone and siltstone. Stratified bedrock. Occurs onshore. Deposited during the Caradoc Series (Ordovician Period) (458.2-449.75 Ma BP)."@en . . . "Castle Point Member"@en . "Castle Point Member"@en . "Sandstone with subsidiary mudstone and siltstone."@en . "CAPO"@en . . "449.75"^^ . . . . "stable"@en . "458.2"^^ . .