. "1000.0"^^ . "stable"@en . "Psammite, quartzite and semipelite with subsidiary pelite and schistose pelite and trace calcsilicate-rock. Stratified bedrock. Occurs onshore. Deposited during the Tonian Period (Precambrian) (1000-720 Ma BP)."@en . . . "720.0"^^ . "Beinn An Tuim Striped Formation"@en . "Upon the Lochailort Pelite Formation (MBLA), likely conformable."@en . "Likely conformable contact with the overlying Druim na Saille Pelite Formation (DRSP) in the south; north and east of Loch Arkaig directly overlain by the Loch Eil Group (LEIL)."@en . . "BTU"@en . "Highly variable, possibly up to 2-3 km."@en . . . "Beinn An Tuim Striped Formation"@en . "Heterogeneous package of variably gneissose psammite, pelite, semipelite and quartzite; interbanded on the metre scale."@en . . .