The BGS Lexicon of Named Rock Units — Result Details

Whitehills Grit Formation

Computer Code: WHSG Preferred Map Code: WhsG
Status Code: Full
Age range: Neoproterozoic Era (AZ) — Neoproterozoic Era (AZ)
Lithological Description: Coarse-grained psammites, commonly gritty, and quartzites, with subsidiary semipelite and pelite; gritty units and semipelites in part calcareous.
Definition of Lower Boundary: Local unconformity at incoming of first major psammite bed above thin-bedded calcareous semipelites of Boyne Limestone Formation.
Definition of Upper Boundary: Transition from partly calcareous semipelite and psammite to non-calcareous lithologies at top of Whitehills Grit Formation; commonly marked by change to graded coarse gritty psammite and semipelite.
Thickness: Probably c.1km, but coast section includes considerable repetition by folding.
Geographical Limits: From Moray Firth coast [NJ 655 652-NJ 789 635] southwards to northern margin of Insch intrusion [NJ 650 325 to NJ 725 305].
Parent Unit: Southern Highland Group (SOHI)
Previous Name(s): Upper Part Of Whitehills Grit (-609)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Coastal section from Whyntie Head to Craig Neen, Whitehills. 
Reference(s):
Stephenson, D, et al. 1993. Stratigraphy and correlation of the Dalradian rocks of the East Grampian Project area. British Geological Survey Technical Report WA/93/91. 
Read, H H, 1923. Geology of the country around Banff, Huntly and Turriff, Lower Banffshire and north-west Aberdeenshire. Memoir of the Geological Survey, Scotland Sheets 86 and 96 (Scotland). 
Stephenson, D and Gould, D , 1995. British Regional Geology: the Grampian Highlands (4th edition). (London: HMSO for the British Geological Survey), 67-68. 
Harris, A L, Haselock, P J, Kennedy, M J and Mendum, J R, 1994. The Dalradian Supergroup in Scotland, Shetland and Ireland. 33-53 in Gibbons, W E and Harris, A L (editors). A revised correlation of Precambrian rocks in the British Isles. Special Report of the Geological Society, London, No.22. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S096 S096 S086 S086