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
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. 
Memoir of the British Geological Survey, Sheet 75, in preparation. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S075 S075 S086 S096