"Copney Pillow-Lava Formation"@en . "Estimated 500m"@en . "stable"@en . . "486.9"^^ . "CPLF"@en . "Boundary not exposed."@en . . . "Boundary not exposed."@en . . . . "Copney Pillow-Lava Formation"@en . . "443.1"^^ . "Basalt, basaltic-andesite and lava. Stratified bedrock. Occurs onshore. Deposited during the Ordovician Period (486.9-443.1 Ma BP)."@en . . "Fine-grained dark-grey to black vesicular lavas (basalt - basaltic andesite) with locally well developed pillow structure."@en .