The BGS Lexicon of Named Rock Units — Result Details

Finglack Till Formation

Computer Code: FINT Preferred Map Code: FinT
Status Code: Full
Age range: Devensian Stage (QD) — Devensian Stage (QD)
Lithological Description: Stiff stony sandy clay diamicton (Lodgement Till), predominantly sandstone clasts.
Definition of Lower Boundary: Sharp, unconformable, glacitectonic contact with Clava Shelly Formation or with bedrock.
Definition of Upper Boundary: Sharp contact with glaciofluvial sheet deposits, ice contact deposits or moundy glacial deposits.
Thickness: 8m or more
Geographical Limits: Sheet 84W (Fortrose)
Parent Unit: Inverness Glacigenic Subgroup (INVG)
Previous Name(s): Boulder Clay (BOC)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  River cliff of Finglack Burn. Section NH74SE E1 on 'standard' map. 'Finglack section' of Merritt (1990). 
Type Section  'Main Pit' composite section of Horne and others (1894). River cliff section of Cassie Burn exposure NH74SE E5 on 'standard' map. 
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). 
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. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S084