The BGS Lexicon of Named Rock Units — Result Details

Dalcharn Palaeosol Formation

Computer Code: DNPS Preferred Map Code: DAL
Status Code: Full
Age range: Ipswichian Stage (QI) — Ipswichian Stage (QI)
Lithological Description: Sandy, pebbly, clayey silt (diamicton), very dense, crudely laminated, fissile, olive grey, with wisps of white silty pebbly sand, disseminated peaty material and charcoal. Pebbles are bleached white. Containing pollen of Interglacial aspect. Passing down into clayey, sandy, silty gravel (diamicton), matrix-supported, very dense, very pale grey to white, with disseminated black charcoal and peaty material. Gravel similar in composition to that occurring in Craig an Daimh Gravel Formation below, but bleached white or pale yellow.
Definition of Lower Boundary: Gradational contact over 20 to 50cm with weathered, clayey cobble gravel of the Craig an Daimh Gravel Formation below.
Definition of Upper Boundary: Sharp, gently undulating, unconformable contact with stony sandy clay diamicton of the Athias Till Formation.
Thickness: 1.6m
Geographical Limits: Sheet 84W (Fortrose), SE of Inverness
Parent Unit: Inverness (Albion) Glacigenic Subgroup (IAG)
Previous Name(s): Dalcharn Biogenic Formation (-2762)
Alternative Name(s): none recorded or not applicable
Type Section  Exposed towards the base of river cliff section of the Allt Dearg, 6km southwest of Cawdor, Nairnshire, at the Dalcharn Interglacial site (west). Walker, M J C and 6 others. 1992. 
Fletcher, T P et al. 1996. Geology of the Fortrose and eastern Inverness district. Memoir of the British Geological Survey, Sheet 84W (Scotland). 
Walker, M J and 6 others. 1992. Allt Odhar and Dalcharn: two pre-Late Devensian (Late Weichselian) sites in northern Scotland. Journal of the Quaternary Science, Vol.7, 69-86. 
Sutherland D G and Gordon, J E. (editors). 1993. The Quaternary of Scotland. Geological Conservation Review Series: 6. London: Chapman and Hall. 
1:50K maps on which the lithostratigraphical unit is found, and map code used: