The BGS Lexicon of Named Rock Units — Result Details

Vaich Pelite Formation

Computer Code: VAPE Preferred Map Code: SYMB
Status Code: Full
Age range: Proterozoic Eon (AP) — Proterozoic Eon (AP)
Lithological Description: Garnet-muscovite-biotite bearing, schistose pelite and semipelite, interbanded with psammitic units.
Definition of Lower Boundary: Overlies the Glascarnoch Psammite Formation at its eastern margin, where predominantly psammitic lithologies pass gradationally into predominantly pelitic lithologies.
Definition of Upper Boundary: Overlain by the Crom Psammite Formation at its western maargin, where predominantly pelitic lithiloigies pass gradationally into predominantly psammitic lithologies.
Thickness: Not recorded.
Geographical Limits: The outcrop runs approximately north to south, continuing north from the western end of Loch Luichart (NH320860) through the south-eastern end of Loch Glascarnoch (NH320720), through Strathvaich Forest to the western end of Gleann Beag (NH300840). It then swings round to the east, forming a large outcrop in the northern part of Freevater Forest (NH350930), before the outcrop thins and swings to the south-east, terminating against a fault in Freevater Forest at (NH455883). To the southern end of Loch Luichart the outcrop runs south-west and thins out near Carn na Feith rabhain (NH225580)
Parent Unit: Morar Group (MORR)
Previous Name(s): Lower Pelite (-598)
Alternative Name(s): none recorded or not applicable
Type Area  On the southern flank of Meall Feith na Slataich, in upper Gleann Beag (Freevater Forest). 
Shepherd, J. 1970. The structure and metamorphism of the Carn Chuinneag area, Ross-shire. (University of Edinburgh.: unpublished PhD thesis.) 
Wilson, D. 1975. Structure and metamorphism of the Ben Wyvis District, Ross-shire. (University of Edinburgh: Unpublished PhD thesis.) 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S083 S093 S093