. "Whiteness 'Division'"@en . "Argyll Group"@en . . . . "Up to 9km"@en . "541.0"^^ . "Top of highest limestone bed in Loch Tay Limestone Formation where present; in Glen Clova and Glen Esk below unit with beds of strongly magnetic semipelite."@en . "Metasedimentary rock based on grain size or crystal size, pelite, psammite, quartzite and semipelite with subsidiary amphibolite, basalt, limestone, micaceous psammite and volcaniclastic rocks (both pyroclastic and reworked volcanic rocks) and trace calcsilicate-rock, gneissose pelite, gneissose psammite, gneissose semipelite and metalimestone. Stratified bedrock. Occurs onshore. Deposited during the Neoproterozoic Era (Precambrian) (1000-541 Ma BP)."@en . . . . . . . "Middle Dalradian Group [Obsolete: use ARGY]"@en . "Generally transitional over a few metres at base of tillite of Port Askaig (Schiehallion) Boulder Bed."@en . . "ARGY"@en . . "stable"@en . . . . . . . . . . . "Argyll Group"@en . "1000.0"^^ . . "Middle Dalradian [Obsolete: use ARGY]"@en . "See descriptions for; Islay Subgroup, Easdale Subgroup, Crinan Subgroup and Tayvallich Subgroup."@en .