The BGS Lexicon of Named Rock Units — Result Details

Beinn Gaire Psammite Member

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