The BGS Lexicon of Named Rock Units — Result Details
Beinn an Uain Till Formation
| Computer Code: | BUTI | Preferred Map Code: | BAU |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Devensian Stage (QD) — Devensian Stage (QD) | ||
| Lithological Description: | Stoney sandy clay diamicton, matrix-supported, dark yellowish brown to olive-grey, fissile, massive, extremely compact, containing angular to subrounded clasts of gneissose psammite and semipelite, 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 10-20cm, or locally a sharp, planar one, with stony, sandy diamictons of the underlying Athais Till Formation, or on bedrock. | ||
| Definition of Upper Boundary: | Erosional contact with gravel of the Carn Monadh Gravel Formation at the Allt Odhar Interstadial site, various younger deposits or the ground surface. | ||
| Thickness: | 10m | ||
| Geographical Limits: | Sheet 84W (Fortrose), southeast of Inverness. | ||
| Parent Unit: | Central Grampian Glacigenic Subgroup (CGDR) | ||
| Previous Name(s): | The Moy Upper Till Member [Obsolete Name and Code: Use BUTI]
(-4506)
The Dalcharn Upper Till Formation (-737) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Partial Type Section | Exposed at the top of river cliffs of the Allt Odhar, immediately upstream of its confluence with the Caochan nan Suidheig, Moy Estate, 16km southeast of Inverness Walker, M J C and 6 others. 1992. | ||
| Partial Type Section | River cliff sections of the Allt Dearg, 6km southwest of Cawdor, Nairnshire. The Dalcharn Interglacial site Walker, M J C, and 6 others. 1992. | ||
| Reference(s): | |||
| 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: | |||
| S084 | |||