The BGS Lexicon of Named Rock Units — Result Details

Corryhabbie Quartzite Formation

Computer Code: COQU Preferred Map Code: SYMB
Status Code: Full
Age range: Neoproterozoic Era (AZ) — Neoproterozoic Era (AZ)
Lithological Description: Orthoquartzite, fawn to white; cross-bedded with pinkish haematite streaks. Thin micaceous interbeds common. Gritty in parts. Flaggy, micaceous psammites locally at top and base.
Definition of Lower Boundary: At lower limit of persistent pasmmite or quartzite above the Mortlach Graphitic Schist Formation.
Definition of Upper Boundary: At upper limit of persistent psammite or quartzite below phyllites and calcareous schists of the Ailnack Phyllite and Limestone Formation or the Cock Burn Calcareous Schist Formation.
Thickness: Generally 80-300m. Wider outcrops may be due to folding.
Geographical Limits: Loch Builg, Inchrory and Carn Mor, upper Strath Don northwards via Glen Avon, Glen Livet. Glen Fiddich to the Balloch Hills near Keith. Small outcrops farther north around Windyhills. 1:50 000 Sheets 75W, 75E, 85E, 86W, 96 (just).
Parent Unit: Ballachulish Subgroup (DABH)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  River Livet, Tomnavoulin. 
Type Area  Ridge extending northeast from Cairn Muldonich, Glenlivet, via Corryhabbie Hill to Lairds Seat, Glenfiddich. 
Reference Section  Water of Ailnack, Tomintoul. 
Reference(s):
Memoir of the British Geological Survey, Sheet 75, in preparation. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S086 S096 S075 S075