The BGS Lexicon of Named Rock Units — Result Details

Cassie Till Formation

Computer Code: CASS Preferred Map Code: Cass
Status Code: Full
Age range: Anglian Stage (QA) — Wolstonian Stage (QO)
Lithological Description: Brown clay with stones: presumably a lodgement till.
Definition of Lower Boundary: Unconformable on bedrock.
Definition of Upper Boundary: Sharp contact with overlying Drummore Gravel Formation.
Thickness: 6.6m
Geographical Limits: Sheet NH74SE
Parent Unit: Inverness (Albion) Glacigenic Subgroup (IAG)
Previous Name(s): Brown Clay with Stones [Obsolete Name and Code: Use CASS] (-1413)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Boreholes 1 and 3 of Horne et al (1894), drilled in ther vicinity of the Type Section of the Clava Shelly Clay. Boreholes at site of the 'Main Pit' of Horne et al (1894). Section NH74SE E5 of 'standard' map. Horne et al. 1894. 
Reference(s):
Merritt, J W 1992. The high-level marine shell-bearing deposits of Clava, Inverness-shire, and their origin as glacial rafts. Quaternary Science Reviews, Vol.11, 759-777. 
Peacock, J D, 1975. Depositional environment of glacial deposits at Clava, north-east Scotland. Bulletin of the Geological Survey of Great Britain, No.49. 31-37. 
Merritt, J W, 1990. The lithostratigraphy at Clava, Inverness-shire and a new model for the origin of its shell-bearing deposits as glacially-transported allochthons. "In" Auton, C A, Firth, C R and Merritt, J W. (Editors). Beauly to Nairn: Field Guide. Quaternary Research Association, Cambridge. 
Horne, J and others, 1894. The character of the high-level shell-bearing deposits at Clava, Chapelhall and other localities. Report of the British Association for the Advancement of Science for 1883, p.483-514. 
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