| Computer Code: |
STRCH |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Tonian Period (AT)
— Tonian Period (AT) |
| Lithological Description: |
Quartzite, white, interbedded with siliceous and micaceous psammite and semipelite; more abundant near the top. |
| Definition of Lower Boundary: |
Enclosed witihin the Tarvie Psammite Formation (TAPS); high up in the sequence. |
| Definition of Upper Boundary: |
Enclosed witihin the Tarvie Psammite Formation (TAPS); high up in the sequence. |
| Thickness: |
none recorded or not applicable
|
| Geographical Limits: |
Northern Highlands, Loch Eil to Loch Ness. |
| Parent Unit: |
Tarvie Psammite Formation (TAPS)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| none recorded or not applicable |
| Reference(s): |
| British Geological Survey. 2007. Ardgour. Scotland Sheet 53W. Bedrock and Superficial Deposits. 1:50 000 Geology Series. (Keyworth, Nottingham: British Geological Survey.) |
| Strachan, R A, May, F and Barr, D, 1988. The Glenfinnan and Loch Eil Divisions of the Moine Assemblage. 32-45 IIV Winchester, J A (editor). Later Proterozoic stratigraphy of the Northern Atlantic regions (Glasgow and London: Blackie). |
| Strachan, R A. 1986. Shallow marine sedimentation in the Proterozoic Moine succession, northern Scotland: Precambrian Research, v. 32, no. 1, p. 17-33. |
| 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. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S053
|
