| Computer Code: |
DNPS |
Preferred Map Code: |
DAL |
| Status Code: |
Full |
| Age range: |
Hoxnian Stage (QX)
— 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 50 cm 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: |
1.6 m. |
| Geographical Limits: |
Sheet S84W (Fortrose), south-east of Inverness. |
| Parent Unit: |
Britannia Catchments Group (BCAT)
|
| Previous Name(s): |
Dalcharn Biogenic Formation [Obsolete Name and Code: Use DNPS]
(-2762)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Exposed towards the base of river cliff section of the Allt Dearg, 6 km southwest of Cawdor, Nairnshire, at the Dalcharn Interglacial site (west). Walker et al., 1992. |
| Reference(s): |
| Sutherland D G and Gordon, J E. (editors). 1993. The Quaternary of Scotland. Geological Conservation Review Series: 6. London: Chapman and Hall. |
| McMillan, A A, Hamblin, R J O, and Merritt, J W. 2011. A lithostratigraphical framework for onshore Quaternary and Neogene (Tertiary) superficial deposits of Great Britain and the Isle of Man. British Geological Survey Research Report, RR/10/03. 343pp. |
| 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. |
| Fletcher, T P et al. 1996. Geology of the Fortrose and eastern Inverness district. Memoir of the British Geological Survey, Sheet 84W (Scotland). |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S084
|
