Computer Code: |
BNGS |
Preferred Map Code: |
symb |
Status Code: |
Full |
Age range: |
Tonian Period (AT)
— Tonian Period (AT) |
Lithological Description: |
Psammite, quartzose and feldspathic, schistose, with layers of garnetiferous pelite and semipelite. |
Definition of Lower Boundary: |
Upon, and partly interbedded with, the Lochailort Pelite Formation (MBLA). |
Definition of Upper Boundary: |
Interbedded with Lochailort Pelite Formation (MBLA) or overlain by the Beinn an Tuim Striped Schist Formation (BTU). |
Thickness: |
none recorded or not applicable
|
Geographical Limits: |
Northern Highlands, from Loch Sunart to Glenfinnan. Restricted to the Sgurr Beag Nappe. |
Parent Unit: |
Lochailort Pelite Formation (MBLA)
|
Previous Name(s): |
none recorded or not applicable
|
Alternative Name(s): |
none recorded or not applicable
|
Stratotypes: |
none recorded or not applicable |
Reference(s): |
Holdsworth, R E, Strachan, R A and Harris, A L, 1994. Precambrian rocks in northern Scotland east of the Moine Thrust: The Moine Supergroup in Gibbons, W and Harris, A L (editors). A revised correlation of Precambrian rocks in the British Isles. Special Report of the Geological Society, No.22. |
Brown, R L, Dalziel, I W D and Johnson, M R W, 1970. A review of the structure and stratigraphy of the Moinian of Ardgour, Moidart and Sunart - Argyll and Inverness-shire. Scottish Journal of Geology, Vol.6, 309-335. |
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: |
S052
S061
S061
|