The BGS Lexicon of Named Rock Units — Result Details

Balnagown Group

Computer Code: BAGR Preferred Map Code: notEntered
Status Code: Full, pending ratification
Age range: Frasnian Age (DR) — Famennian Age (DA)
Lithological Description: Yellow and red, medium-grained, cross bedded sandstone of fluvial origin with scattered pebbles.
Definition of Lower Boundary: Drawn at base of yellow and red sandstones of the Balnagown Group where it rests unconformably on sandstone of the Strath Rory Group.
Definition of Upper Boundary: Drawn at unconformable upward change from yellow and red sandstone of the Balnagown Group to probable Jurassic Strata.
Thickness: Not known.
Geographical Limits: Highlands, Scotland.
Parent Unit: Not Entered (?)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Balnagown River, near Balnagown Castle, 6km south of Tain, Easter Ross, Highlands, Scotland. 
Reference(s):
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. 
Armstrong, M. Not published. The geology of the region between the Alness River and the Dornoch Firth. Ph. D. Thesis, Newcastle upon Tyne University. 1964. 
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. 
Mykura, W, 1983. Old Red Sandstone. "In" Craig, G Y. Geology of Scotland, 2nd. edition, Edinburgh. 
Johnston, G S and Mykura, W. 1989. British regional geology: the Northern Highlands (4th edition) (London: HMSO for the British Geological Survey.) 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable