The BGS Lexicon of Named Rock Units — Result Details

Kynachan Quartzite Formation

Computer Code: KYQ Preferred Map Code: KynQ
Status Code: Full
Age range: Neoproterozoic Era (AZ) — Neoproterozoic Era (AZ)
Lithological Description: Massive, white to cream, granular impure feldspathic quartzite, probably forming a lensoid unit thickened by folding. Quartzite thins and becomes more schistose along strike from the type locality to the west.
Definition of Lower Boundary: Gradational boundary with underlying Tummel Psammite Formation.
Definition of Upper Boundary: Gradational boundary with overlying Kynachan Psammite Formation.
Thickness: 0 - 500m
Geographical Limits: From Allt na Moine Buidhe [NN 720 611] via the main ridge of Creag Kynachan [NN 761 579] to the Loch Tay Fault near Blairbuie [NN 808 605]. Also has outcrop near the Torr Dubh structured dome resulting from interference of the Clunes and Bohespic antiforms [NN 745 632].
Parent Unit: Strathtummel Subgroup (STEL)
Previous Name(s): Kynachan Quartzite (-4743)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Ridge of Creag Kynachan. 
Reference(s):
Treagus, J E. 2001. Solid geology of the Schiehallion district. Memoir of the British Geological Survey, Sheet 55W (Scotland). 
Stephenson, D and Gould, D , 1995. British Regional Geology: the Grampian Highlands (4th edition). (London: HMSO for the British Geological Survey), 67-68. 
Thomas, P R, 1980. The stratigraphy and structure of the Moine rocks north of the Schiehallion Complex, Scotland. Journal of the Geological Society, London, Vol.137, 469-482. 
Harris, A L, Haselock, P J, Kennedy, M J and Mendum, J R, 1994. The Dalradian Supergroup in Scotland, Shetland and Ireland. 33-53 in Gibbons, W E and Harris, A L (editors). A revised correlation of Precambrian rocks in the British Isles. Special Report of the Geological Society, London, No.22. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S055