The BGS Lexicon of Named Rock Units — Result Details
West Sands Semipelite Member
| Computer Code: | WESD | Preferred Map Code: | WeSd |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Neoproterozoic Era (AZ) — Neoproterozoic Era (AZ) | ||
| Lithological Description: | Semipelite, micaceous, generally biotite-rich and garnetiferous. | ||
| Definition of Lower Boundary: | Sharp change from feldspathic quartzite and psammite of the Sunnyside Sandstone Member (Cullen Quartzite Formation).Locally faulted (e.g. on coast section). | ||
| Definition of Upper Boundary: | Transition to thin-bedded, flaggy psammite and semipelite within the Findlater Flag Formation. | ||
| Thickness: | c.100m on coast section and inland. | ||
| Geographical Limits: | From coast at West Sands [NJ 5375 6740], as far as Easter Bogs [NJ 410 630] (Sheet 95), where it is unconformably overlain by Devonian sedimentary rocks. | ||
| Parent Unit: | Findlater Flag Formation (FIFL) | ||
| Previous Name(s): | West Sands Mica Schist
(-862)
West Sands Mica-Schist [Obsolete Code: See WESD] (DAWS) West Sands Mica Schist Member [Obsolete Name and Code: Use WESD] (-3756) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Section | On the coast at West Sands Bay. | ||
| Reference(s): | |||
| Stephenson, D, et al. 1993. Stratigraphy and correlation of the Dalradian rocks of the East Grampian Project area. British Geological Survey Technical Report WA/93/91. | |||
| Harris, A L, Haselock, P J, Kennedy, M J and Mendum, J R, 1994. The Dalradian Supergroup in Scotland, Shetland and Ireland. 33-53 in Gibbons, W E and Harris, A L (editors). A revised correlation of Precambrian rocks in the British Isles. Special Report of the Geological Society, London, No.22. | |||
| Stephenson, D and Gould, D. 1995. British Regional Geology: the Grampian Highlands (4th edition). (London: HMSO for the British Geological Survey), 67-68. | |||
| Read, H H, 1923. Geology of the country around Banff, Huntly and Turriff, Lower Banffshire and north-west Aberdeenshire. Memoir of the Geological Survey, Scotland Sheets 86 and 96 (Scotland). | |||
| Peacock, J D, Berridge, N G, Harris, A L, May, F. 1968. The geology of the Elgin District. Memoir of the Geological Survey of Scotland. Sheets 86 and 96 (Scotland). (Edinburgh: HMSO). | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| S096 S095 | |||