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
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. 
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: