The BGS Lexicon of Named Rock Units — Result Details
Scresort Sandstone Member
| Computer Code: | TCAS | Preferred Map Code: | notEntered |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Tonian Period (AT) — Tonian Period (AT) | ||
| Lithological Description: | Medium- to coarse-grained sandstones containing "exotic" pebbles; abundant cross-bedding and soft-sediment convolution structures. Minor fine-grained sandstones, siltstones and mudstones. | ||
| Definition of Lower Boundary: | Overlying the Allt Mor Na H-Uamha Member (TCAM): incoming of first thickly-bedded, cross stratified and/or convoluted coarse-grained sandstone bed with 'exotic' pebbles characteristic of the Applecross Formation. (NM 4108 9751 or NM 4155 9905). | ||
| Definition of Upper Boundary: | Overlain by the Leac Nam Faoileann Member (TCAF) on Soay; overlain by the Sgorr Mhor Sandstone Member (TCSM) on Rum. Marked by the disappearance of 'exotic' pebbles. | ||
| Thickness: | Total thickness (from NG 4230 0014 to NG 3270 0200) of c.2000m +/- 500m (allowing for uncertainty in fault displacements). | ||
| Geographical Limits: | Inner Hebrides: Rum, Soay. | ||
| Parent Unit: | Applecross Formation (TCA) | ||
| Previous Name(s): | Guirdil Arkose [Obsolete Name and Code: Use TCAS, TCSM]
(-3074)
Rudha Na Roinne Grit [Obsolete Name and Code: Use TCAS, TCAM] (-1222) Loch Nan Eala Arkose [Obsolete Name and Code: Use TCAS] (-1223) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Area | Type Area - Isle of Rum, Loch Scresort; [NG 423 001 to NG 327 020]. | ||
| Reference(s): | |||
| Emeleus, C H. 1997. Geology of Rum and the adjacent islands. Memoir (sheet) of the Geological Survey of Great Britain (Scotland) (60). (The Stationery Office for the British Geological Survey.) 171pp. | |||
| Stewart, A D. 2002. The later Proterozoic Torridonian rocks of Scotland: their sedimentology, geochemistry and origin. Geological Society Memoir. Vol. 24. (The Geological Society.) | |||
| Krabbendam, M. 2021. A stratigraphic framework for the early Neoproterozoic successions of the Northern Highlands of Scotland. UK Stratigraphic Framework Series. British Geological Survey Open Report, OR/21/072. 86pp. | |||
| Black, G P, and Welsh, W, 1961. The Torridonian succession of the Isle of Rhum. Geological Magazine, Vol. 98, 265-276. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| S060 | |||