The BGS Lexicon of Named Rock Units — Result Details

Findlater Flag Formation

Computer Code: FIFL Preferred Map Code: SYMB
Status Code: Full
Age range: Neoproterozoic Era (AZ) — Neoproterozoic Era (AZ)
Lithological Description: Mainly thinly banded, flaggy, micaceous psammite and semipelite with more dominant semipelite locally.
Definition of Lower Boundary: Base of thinly bedded, flaggy psammites and semipelites above massive or thick-bedded quartzites of the Grampian Group (eg Cullen Quartzite Formation).
Definition of Upper Boundary: Top of non-calcareous flaggy psammites and semipelites that pass upwards into banded calcareous flags of the Pitlurg, Cairnfield or Foddsletter Formations, depending upon locality.
Thickness: c. 1350m on coast section; over 400m inland.
Geographical Limits: 1) Newmill (Sheet 85E) and Drybridge (Sheet 95) to coast between Logie Head and Crathie Point (Sheet 96). 2) Core of Ardonald Anticline from SW of Jock's Hill (Sheet 85E) to Ardonald (Sheet 86W). 3) From Rothes Fault at Maggie Knockater to Burn of Mulben (Sheet 85E).
Parent Unit: Lochaber Subgroup (DALO)
Previous Name(s): Findlater Flags [Obsolete Name And Code: Use FIFL] (DAFF)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Coastal section from Logie Head to the western side of Crathie Point. (Sheet 96). 
Reference Section  Core Burn, between Linnhouse Wood and Newton of Letterfourie (Sheet 95). 
Reference Section  Burn of Bellyhack from confluence with Burn of Bogallie to 400m SE of Mains of Bellyhack (Sheet 85E). 
Reference(s):
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, et al. 1993. Stratigraphy and correlation of the Dalradian rocks of the East Grampian Project area. British Geological Survey Technical Report WA/93/91. 
Peacock, J D, Berridge, N G, Harris, A L, May, F. 1968. The geology of the Elgin District. Memoir of the Geological Survey of Scotland. Sheets 86 and 96 (Scotland). (Edinburgh: HMSO). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S086 S096 S085 S095 S096