"Tuff. Stratified bedrock. Occurs onshore. Deposited during the Givetian Age (Devonian Period) (385.3-378.9 Ma BP)."@en . "BLHT"@en . . . . . "Blair Hill Tuff Member"@en . "stable"@en . "385.3"^^ . . "Tuff."@en . . . "378.9"^^ . . "Blair Hill Tuff Member"@en .