"422.7"^^ . . "Aberedw Formation"@en . "426.7"^^ . . "Stratified bedrock. Occurs onshore. Deposited during the Ludlow Epoch (Silurian Period) (426.7-422.7 Ma BP)."@en . . "ABDW"@en . . . "stable"@en . . "Aberedw Formation"@en . .