| Computer Code: |
GAIR |
Preferred Map Code: |
GV |
| Status Code: |
Full |
| Age range: |
Neoproterozoic Era (AZ)
— Neoproterozoic Era (AZ) |
| Lithological Description: |
Pink, grey and fawn feldspathic psammite and micaceous psammite with pebbly layers, particularly towards the top of the member. |
| Definition of Lower Boundary: |
Transitional, placed where feldspar clasts and pebble bands become abundant within the Garva Bridge Psammite Formation. |
| Definition of Upper Boundary: |
Abrupt and locally transitional over a few metres. Placed where highly strained pebbly psammite, psammite and some quartzite are overlain by schistose to gneissose semipelite. |
| Thickness: |
up to 700 m. |
| Geographical Limits: |
Western part of Monadhliath Mountains in Central Highlands. Mostly in NW part of sheet 63E [Dalwhinnie] and on sheet 73E [Foyers]. |
| Parent Unit: |
Garva Bridge Psammite Formation (GABR)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Northern and western walls of Garbh Coire. |
| Reference(s): |
| Glover, B W. 1998. Sedimentology and lateral extent of the Glenshirra Succession, Monadhliath Mountains, Scotland, British Geological Survey Technical Report WA/98/23. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S063
S063
S073
|
