The BGS Lexicon of Named Rock Units — Result Details

Balmakeith Till Member

Computer Code: BALT Preferred Map Code: BK
Status Code: Full
Age range: Devensian Stage (QD) — Devensian Stage (QD)
Lithological Description: Diamicton, firm, sandy and silty, moderate reddish-brown to "reddish-yellow" with abundant rounded clasts of red-brown Upper Devonian (Nairn Sandstone Formation) sandstone.
Definition of Lower Boundary: Unconformable (commonly tectonised) contact on underlying pebbly sands of the Ardersier Silts Formation or unconformable on bedrock.
Definition of Upper Boundary: Unconformable contact with overlying sands and silts of the Ardersier Silts Formation.
Thickness: To 3.2m
Geographical Limits: Outcrops in main late glacial cliff between Nairn and Kingsteps Quarry; farther eastwards on 1:50000 Sheet 84 E (Nairn).
Parent Unit: Finglack Till Formation (FINT)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Trench section, Balmakeith Industrial Estate, Nairn. 
Partial Type Section  Site Investigation Borehole (SE 9661 BH 505), 7.5 to 10.7m depth. Railway bridge improvement, Forres Road, Nairn. 
Reference(s):
Fletcher, T P et al. 1996. Geology of the Fortrose and eastern Inverness district. Memoir of the British Geological Survey, Sheet 84W (Scotland). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S084