The BGS Lexicon of Named Rock Units — Result Details

Glen Doe Psammite Formation

Computer Code: GDOE Preferred Map Code: D
Status Code: Full
Age range: Neoproterozoic Era (AZ) — Neoproterozoic Era (AZ)
Lithological Description: Uniform turbiditic, feldspathic and micaceous psammite with thin semipelite interbeds and calc-silicate rock lenses.
Definition of Lower Boundary: Transitional with underlying Coire nan Laogh Semipelite Formation, contact taken at decrease of semipelite to <20% of the succession.
Definition of Upper Boundary: Normal conformable contact with Tarff Banded or Monadhliath Semipelite formations, taken at incoming of semipelite to >20% of the succession.
Thickness: 2500m +
Geographical Limits: Northwestern part of Monadhliath Mountains, particularly in Glen Doe, Corrieyairack Pass and forest areas, and River Fechlin section and surrounding mountains.
Parent Unit: Corrieyairack Subgroup (GRCO)
Previous Name(s): none recorded or not applicable
Alternative Name(s): Loch Laggan Psammite Formation.
Stratotypes:
Reference Section  Upper crags of Carn a' Chuilinn. 
Type Area  Upper part of Glen Doe. 
Reference(s):
Key, R M, Clark, G C, May, F, Phillips, E R, Chacksfield, B C and Peacock, J D, 1997. Geology of the Glen Roy district. Memoir of the British Geological Survey, Sheet 63W [Scotland]. 
May, F and Highton, A J, 1997. Geology of the Invermoriston district. Memoir of the British Geological Survey, sheet 73W [Scotland]. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S063 S073 S073