"By overlying Crinkle Member of Airy's Bridge Tuff Formation."@en . "Bad Step Tuff"@en . "Base of rhyolitic, lava-like tuff. Unconformable on various units within the underlying Long Top Tuffs of Airy's Bridge Tuff Formation."@en . "White to pink weathered rhyolitic, high-grade lava-like tuff; garnetiferous."@en . "40 - 400m"@en . . . . . . "stable"@en . "Bad Step Tuff Member [Obsolete: use BDP]"@en . "Bad Step Tuff"@en . . "BDP"@en . "458.2"^^ . . . . "Rhyolitic tuff. Stratified bedrock. Occurs onshore. Deposited during the Caradoc Series (Ordovician Period) (458.2-449.75 Ma BP)."@en . "449.75"^^ .