| 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: |
| Type Area |
Upper part of Glen Doe. |
| Reference Section |
Upper crags of Carn a' Chuilinn. |
| 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]. |
| British Geological Survey. 1995. Glen Roy, Scotland sheet 63W. Solid Geology 1:50 000 (Keyworth, Nottingham: British Geological Survey.) |
| British Geological Survey. 1996. Foyers Scotland Sheet 73E. Solid geology 1:50 000. (Keyworth, Nottingham: British Geological Survey.) |
| 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
|
