| Computer Code: |
RNTI |
Preferred Map Code: |
RLN |
| Status Code: |
Full |
| Age range: |
Devensian Stage (QD)
— Devensian Stage (QD) |
| Lithological Description: |
Stony sandy clay diamicton, matrix-supported, dark yellowish brown, fissile, massive, extremely compact, containing angular to sub-rounded clasts of gneissose psammite and semipelite, pink and grey granite and some Devonian sandstone and siltstone. Typical lodgement till with well developed north-easterly fabric and containing concavo-convex discontinuities that are commonly sand-filled. |
| Definition of Lower Boundary: |
Generally a gradational contact over 10 to 20cm, but locally a sharp, planar contact and change in colour from dark yellowish brown to "strong brown" (Munsell Soil), with underlying stony sandy clay diamictons of the Cantray Till Member. |
| Definition of Upper Boundary: |
Erosional contact with gravel of the Carn Monadh Gravel Formation at the Allt Odhar Interstadial site, otherwise overlain by various younger deposits or boundary at the ground surface. |
| Thickness: |
3.5m |
| Geographical Limits: |
Sheet 84W (Fortrose), southeast of Inverness. |
| Parent Unit: |
Beinn an Uain Till Formation (BUTI)
|
| Previous Name(s): |
Upper Member of the Dalcharn Upper Till [Obsolete Name and Code: Use RNTI]
(-4302)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Exposed towards the tops of river cliff sections of the Allt Dearg, 6km southwest of Cawdor, Nairnshire, in the vicinity of the Dalcharn Interglacial site. Walker, M J C and 6 others. 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. |
| 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. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S084
|
