. "451.25"^^ . "Yellowish brown siltstones and sandstones."@en . "Cheney Longville Formation"@en . "c.120m in the Church Stretton area; to c.250m in the Caradoc (north) area."@en . . . "CHLF"@en . . . "stable"@en . . "Cheney Longville Formation"@en . "Cheney Longville Flags [Obsolete: use CHLF]"@en . "453.833"^^ . "Sandstone and siltstone. Stratified bedrock. Occurs onshore. Deposited during the Longvillian Substage - to - Marshbrookian Substage (Ordovician Period) (453.833-451.25 Ma BP)."@en .