The BGS Lexicon of Named Rock Units — Result Details

Tummel Psammite Formation

Computer Code: TUPS Preferred Map Code: TumP
Status Code: Full
Age range: Neoproterozoic Era (AZ) — Neoproterozoic Era (AZ)
Lithological Description: Regularly and thick-bedded psammite, with dune-bedding and ripple marks. Minor schistose pelite.
Definition of Lower Boundary: Gradational boundary with underlying Tummel Quartzite Formation.
Definition of Upper Boundary: Gradational boundary with Kynachan Quartzite Formation.
Thickness: 200 - 800m
Geographical Limits: On southern side of Meall Reamhar Synform from near Trinafour [NN 728 645] via north flank of Creag Kynachan [NN 769 579] to River Garry east of Tomban [NN 829 654]; on northern side of Meall Reamhar Synform from Meall a'Chataidh [NN 745 680] via Over Bohespic [NN 758 611] to Kinaldy [761 645]; also probably in River Garry around [NN 787 667].
Parent Unit: Strathtummel Subgroup (STEL)
Previous Name(s): Tummel Psammite (-3098)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  South bank of River Tummel westwards from weir below Dunalastair Dam to Dam and beyond along south shore of Dunalastair Reservoir. 
Reference(s):
Treagus, J E. 2001. Solid geology of the Schiehallion district. Memoir of the British Geological Survey, Sheet 55W (Scotland). 
Harris, A L, Haselock, P J, Kennedy, M J and Mendum, J R, 1994. The Dalradian Supergroup in Scotland, Shetland and Ireland. 33-53 in Gibbons, W E and Harris, A L (editors). A revised correlation of Precambrian rocks in the British Isles. Special Report of the Geological Society, London, No.22. 
Stephenson, D and Gould, D , 1995. British Regional Geology: the Grampian Highlands (4th edition). (London: HMSO for the British Geological Survey), 67-68. 
Thomas, P R, 1980. The stratigraphy and structure of the Moine rocks north of the Schiehallion Complex, Scotland. Journal of the Geological Society, London, Vol.137, 469-482. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S055 S055