The BGS Lexicon of Named Rock Units — Result Details

Struie Group [Obsolete Name And Code: See STIE]

Computer Code: STRU Preferred Map Code: notEntered
Status Code: Index Level
Age range: Pragian Age (DP) — Emsian Age (DE)
Lithological Description: Lenticular conglomerates intercalated with grey and black flaggy sandstones, siltstones and mudstones. Dark grey siltstones and calcareous mudstones also occur.
Definition of Lower Boundary: Drawn at base of basal breccia - conglomerate of the Struie Group where it rests unconformably on the Moine Basement Rocks.
Definition of Upper Boundary: Drawn at unconformable upward change from siltstone and mudstone of the Struie Group to conglomerate of the Strath Rory Group.
Thickness: c. 2500m
Geographical Limits: Highlands, Scotland.
Parent Unit: Not Entered (?)
Previous Name(s): none recorded or not applicable
Alternative Name(s): Struie Formation
Stratotypes:
Type Area  Cromarty, Highlands, Scotland. 
Type Area  Struie Mount, Easter Ross, Highlands, Scotland. 
Reference(s):
Johnstone, G S, 1989. The Northern Highlands of Scotland. British Regional Geology. p.122. 
Mykura, W, 1983. Old Red Sandstone. "In" Craig, G Y. Geology of Scotland, 2nd. edition, Edinburgh. 
Armstrong, M, 1977. The Old Red Sandstone of Easter Ross and the Black Isle. "In" Gill, G. (Editor). The Moray Firth area - geological studies. Inverness Field Club. 
House, M R, Richardson, J B, Chaloner, W G, Allen, J R L, Holland, C H and Westoll, T S. 1977. A Correlation of Devonian rocks of the British Isles. Geological Society of London, Special Report No.8, Scottish Academic Press, Edinburgh. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable