| Computer Code: |
BBPS |
Preferred Map Code: |
BB |
| Status Code: |
Full |
| Age range: |
Tonian Period (AT)
— Tonian Period (AT) |
| Lithological Description: |
Gneissose interbanded psammite, micaceous psammite and siliceous psammite. Locally migmatitic. |
| Definition of Lower Boundary: |
Conformable contact with Creag Bhuidhe Semipelite (CGBH); contact is poorly exposed |
| Definition of Upper Boundary: |
Overlain by Flichity Semipelite Formation (FLTY) with a transitional, locally sheared contact. No way-up criteria. |
| Thickness: |
none recorded or not applicable
|
| Geographical Limits: |
Central Highlands, SE of Loch Ness, Strathnairn to Strathdean, Slochd area. |
| Parent Unit: |
Dava Subgroup (DAVA)
|
| Previous Name(s): |
Beinn Bhreac Psammite [Obsolete Name and Code: Use BBPS]
(-2580)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Reference Section |
On the ridge east of Mains of Flichity [NH 686 290]. |
| Reference Section |
On the crags north of Brin Rock [NH 662 300]. |
| Type Area |
On the hill Beinn Bhreac, at [NH 757 276]. |
| Reference(s): |
| Krabbendam, M. 2021. A stratigraphic framework for the early Neoproterozoic successions of the Northern Highlands of Scotland. UK Stratigraphic Framework Series. British Geological Survey Open Report, OR/21/072. 86pp. |
| Leslie, A G, Robertson, S, Smith, M, Banks, C J, Mendum, J R, and Stephenson, D. 2013. The Dalradian rocks of the northern Grampian Highlands of Scotland. Proceedings of the Geologists' Association, Vol. 124, 263-317. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S074
|
