The BGS Lexicon of Named Rock Units — Result Details

Red Craig Gravels Formation

Computer Code: RCGR Preferred Map Code: notEntered
Status Code: Full
Age range: Devensian Stage (QD) — Devensian Stage (QD)
Lithological Description: Gravel, clast-supported but locally matrix-supported with matrix of reddish-brown sandy mud. Angular clasts of sandstone and psammite.
Definition of Lower Boundary: Not seen, but probably rests directly on bedrock.
Definition of Upper Boundary: Sharp, gently undulating erosion surface. Overlain by Kincurdy Silts Formation.
Thickness: 12m+.
Geographical Limits: Confined to Rosemarkie Glen, Rosemarkie, Black Isle.
Parent Unit: Inverness Glacigenic Subgroup (INVG)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Cliff immediately to north of Rosemarkie Village. (Forming base of cliff), Ross and Cromarty. 
Type Area  Rosemarkie Glen, a deep glacial meltwater channel extending northwestwards from Rosemarkie. 
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