Computer Code: |
FLTY |
Preferred Map Code: |
F |
Status Code: |
Full |
Age range: |
Tonian Period (AT)
— Tonian Period (AT) |
Lithological Description: |
Gneissose, locally migmatitic semipelite with minor quartzite. Quartzite is more common near contacts with adjacent units. |
Definition of Lower Boundary: |
Transitional with the Beinn Bhreac Psammite Formation (BBPS); incoming of first persistent quartzite layer. No way-up criteria. |
Definition of Upper Boundary: |
Sheared contact with the structurally overlying Slochd Psammite Formation (SLCD); No way-up criteria. |
Thickness: |
c. 300 m (deformed thickness). |
Geographical Limits: |
Central Highlands of Scotland. Strathnairn to Findhorn area, in the Tomatin, Aviemore and Nairn districts. |
Parent Unit: |
Dava Subgroup (DAVA)
|
Previous Name(s): |
none recorded or not applicable
|
Alternative Name(s): |
none recorded or not applicable
|
Stratotypes: |
Type Area |
Rocky ridge of Creag Flichity [NH 685 286]. |
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
S074
S084
|