| Computer Code: |
BMPP |
Preferred Map Code: |
BM |
| Status Code: |
Full |
| Age range: |
Neoproterozoic Era (AZ)
— Neoproterozoic Era (AZ) |
| Lithological Description: |
Feldspathic psammite (arkosic) with thin semipelite beds and gritty beds with abundant quartz and feldspar clasts. |
| Definition of Lower Boundary: |
Not exposed; unknown. |
| Definition of Upper Boundary: |
Conformably overlain by Ruthven Semipelite Formation, sharp disconformity and marked lithological change from psammitic sequence to gneissose semipelite. |
| Thickness: |
none recorded or not applicable
|
| Geographical Limits: |
Central Highlands of Scotland E of Great Glen fault - Strathnairn area. Sheet 73E (Foyers). |
| Parent Unit: |
Glenshirra Subgroup (GRGL)
|
| Previous Name(s): |
Gairbeinn Psammite Formation
(-708)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Beinn Mheadhoin - summit area and northern ridge. |
| Reference Section |
Cairn Poullachie - minor hill south of B851. |
| Type Section |
Ridge between Beinn Bhuidhe and Garbhal Mor. |
| Reference(s): |
| British Geological Survey. 1996. Foyers Scotland Sheet 73E. Solid geology 1:50 000. (Keyworth, Nottingham: British Geological Survey.) |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S073
|
