. "Glyn Gower Siltstones [Obsolete: use GYG]"@en . "Obsolete name. Stratified bedrock. Occurs onshore. Deposited during the Caradoc Series (Ordovician Period) (458.2-449.75 Ma BP)."@en . "GLS"@en . . . "458.2"^^ . . . . "archaic"@en . "Glyn Gower Siltstones Member"@en . . "[Obsolete: use GYG]"@en . "Glyn Gower Siltstones [Obsolete: use GYG]"@en . "449.75"^^ . .