"Achnacarry Striped Formation"@en . . . "Likely conformable contact with the overlying Tarve Psammite Formation (Loch Eil Group), via a transitional boundary."@en . "1000.0"^^ . . . "Achnacarry Striped Formation"@en . "ACNS"@en . "Gneissose psammite and semipelite, interbanded. Locally calc-silicate bands."@en . "stable"@en . "Gneissose psammite and gneissose semipelite. Stratified bedrock. Occurs onshore. Deposited during the Tonian Period (Precambrian) (1000-720 Ma BP)."@en . "720.0"^^ . . "Not exposed."@en . . . .