The BGS Lexicon of Named Rock Units — Result Details

Dunbeath Till Formation

Computer Code: DUTI Preferred Map Code: DB
Status Code: Full
Age range: Devensian Stage (QD) — Devensian Stage (QD)
Lithological Description: Sandy, silty and commonly gritty, diamicton, typically pale to dark brown; clasts include Devonian mudstones, sandstones and flagstones, with some Caledonian igneous and Moine metamorphic rocks.
Definition of Lower Boundary: Unconformable on bedrock.
Definition of Upper Boundary: Base of the Reisgill Burn Till Formation, typically the base of the Forse Till member.
Thickness: To 12m
Geographical Limits: Caithness and Sutherland northeast of a line between Reay and Berridale (1:50 000 sheets 115E and W, 116E and W, 110).
Parent Unit: Northwest Highlands Glacigenic Subgroup (NWHG)
Previous Name(s): Dunbeath Till (-4014)
Alternative Name(s): Skurley Till Member and Balantrath Members Of The Berridale Formation
Stratotypes:
Type Section  Dunbeath Water, about 200m upstream of the A9T road bridge. Omand, 1973, p.28. 
Reference Section  River cliff at Balantrath on the Dunbeath Water. Hall and Whittington, 1989, p.314. 
Reference(s):
Hall, A M and Whittington, G. 1989. Late Devensian glaciation of southern Caithness. Scottish Journal of Geology, Vol.25, 307-324. 
Omand, D. 1973. The glaciation of Caithness. Unpublished MSc Thesis, University of Strathclyde. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S116 S110 S115