. . . "Unconformably overlies the Skiddaw Group; the base is taken at this unconformity where there is a profound change from a marine mudrock sequence to a volcanic one."@en . . . . . . "stable"@en . "Unconformably overlain by Windermere Supergroup."@en . "BVG"@en . . "Borrowdale Volcanic Series [Obsolete: use BVG]"@en . "Andesite, andesitic tuff, dacite, dacitic lapilli-tuff, rhyolitic lapilli-tuff, volcaniclastic-sandstone and volcaniclastic-sedimentary-rock with subsidiary andesitic lapilli-tuff, basalt, basaltic-andesite, pyroclastic-breccia and rhyolite and trace basaltic tuff. Stratified bedrock. Occurs onshore. Deposited during the Caradoc Series (Ordovician Period) (458.2-449.75 Ma BP)."@en . "Borrowdale Volcanic Group"@en . . . . . . . . . . . . . . . . . "458.2"^^ . . . . . . . . . . . . . . "Variable, but probably up to 6000m."@en . . . . . . . . . . . . . . . "Medium to high-k, continental margin calc-alkaline basalt-andesite-rhyolite volcanic association of lavas, sills, pyroclastic and reworked pyroclastic deposits. NOTE: See definitions of component formations and members."@en . . "Borrowdale Volcanic Group"@en . . . "449.75"^^ . . . . .