The BGS Lexicon of Named Rock Units — Result Details

Glen Banchor Subgroup

Computer Code: GLBA Preferred Map Code: GB
Status Code: Full
Age range: Tonian Period (AT) — Tonian Period (AT)
Lithological Description: Strongly gneissose heterolithic association - dominantly of psammite, striped psammite and semipelite quartzite. Locally migmatitic with minor pods and lenses of amphibolitic metabasic rock.
Definition of Lower Boundary: Not exposed.
Definition of Upper Boundary: Unconformity interpreted with overlying Grampian and Appin Group metasediments.
Thickness: 1 - 1.5 km estimated.
Geographical Limits: Central Highlands of Scotland. Newtonmore - Kincraig areas and possibly with representatives in the Aviemore - Fortrose and Nairn districts.
Parent Unit: Badenoch Group (BADN)
Previous Name(s): Glen Banchor Succession (-2205)
Central Highland Division (-1419)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Glen Banchor to Laggan. 
Reference Section  Various parts of Kincraig inlier. NW of Loch Insch to River Dulnain. 
Reference(s):
Piasecki, M A J, and Van Breemen, O, 1983. Field and isotopic evidence for a c. 750 Ma tectonothermal event in Moine rocks in the Central Highland region of the Scottish Caledonides. Transactions of the Royal Society of Edinburgh: Earth Sciences, Vol. 73 [for 1982], 119-134. 
Gillespie, M R, Campbell, S D G, and Stephenson, D. 2011. BGS classification of lithodemic units: a classification of onshore Phanerozoic intrusions in the UK. British Geological Survey Research Report, RR/12/01. 58pp. 
Piasecki, M A J, 1980. New light on the Moine rocks of the Central Highlands of Scotland. Journal of the Geological Society, London, Vol. 137, p. 41 - 68. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S074 S063