The BGS Lexicon of Named Rock Units — Result Details

Odhar Gravel Member

Computer Code: ODGR Preferred Map Code: OHR
Status Code: Full
Age range: Devensian Stage (QD) — Devensian Stage (QD)
Lithological Description: Cobble gravel with lenses of finer gravel and sand, dense, mainly clast-supported, containing subangular to rounded clasts of pink granite with psammites, gneiss and schist. All but psammite clasts commonly weathered. Iron-pan commonly developed.
Definition of Lower Boundary: Sharp, erosional, undulating contact with underlying sandy clayey diamicton of the Suidheig Till Formation.
Definition of Upper Boundary: Conformable contact with overlying compressed peat of the Allt Odhar Peat Formation.
Thickness: 2m
Geographical Limits: Sheet 84W (Fortrose), southest of Inverness.
Parent Unit: Moy Burn Palaeosol Formation (MBP)
Previous Name(s): Odhar Gravel Formation (-2349)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Exposed midway up a river cliff of the Allt Odhar, immediately upstream of its confluence with the Caochan nan Suidheig, Moy Estate, 16km southeast of Inverness. Walker, M J C and 6 others. 1992 
Reference(s):
Walker, M J and 6 others. 1992. Allt Odhar and Dalcharn: two pre-Late Devensian (Late Weichselian) sites in northern Scotland. Journal of the Quaternary Science, Vol.7, 69-86. 
Fletcher, T P et al. 1996. Geology of the Fortrose and eastern Inverness district. Memoir of the British Geological Survey, Sheet 84W (Scotland). 
Sutherland D G and Gordon, J E. (editors). 1993. The Quaternary of Scotland. Geological Conservation Review Series: 6. London: Chapman and Hall. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S084