. "168.2"^^ . "stable"@en . . "Collyweston Slate"@en . "Collyweston Slate"@en . . . . "CWSL"@en . "170.9"^^ . . "Bedrock. Occurs onshore. Formed during the Bajocian Age (Jurassic Period) (170.9-168.2 Ma BP)."@en .