The BGS Lexicon of Named Rock Units — Result Details
Glen Banchor Subgroup
| Computer Code: | GLBA | Preferred Map Code: | GB |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Tonian Period (AT) — Tonian Period (AT) | ||
| Lithological Description: | Strongly gneissose heterolithic association - dominantly of psammite, striped psammite and semipelite quartzite. Locally migmatitic with minor pods and lenses of amphibolitic metabasic rock. | ||
| Definition of Lower Boundary: | Not exposed. | ||
| Definition of Upper Boundary: | Unconformity interpreted with overlying Grampian and Appin Group metasediments, but contact commonly sheared. | ||
| Thickness: | 1 - 1.5 km estimated. | ||
| Geographical Limits: | Central Highlands of Scotland. Newtonmore - Kincraig areas and possibly with representatives in the Aviemore - Fortrose and Nairn districts. | ||
| Parent Unit: | Badenoch Group (BADN) | ||
| Previous Name(s): | Central Highland Division [Obsolete Name and Code: Use GLBA, CEHI]
(-1419)
Glen Banchor Succession [Obsolete Name and Code: Use GLBA] (-2205) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Reference Section | Various parts of Kincraig inlier. NW of Loch Insch to River Dulnain. | ||
| Type Area | Glen Banchor to Laggan. | ||
| Reference(s): | |||
| Piasecki, M A J, and Van Breemen, O, 1983. Field and isotopic evidence for a c. 750 Ma tectonothermal event in Moine rocks in the Central Highland region of the Scottish Caledonides. Transactions of the Royal Society of Edinburgh: Earth Sciences, Vol. 73 [for 1982], 119-134. | |||
| 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. | |||
| Leslie, A G, Robertson, S, Smith, M, Banks, C J, Mendum, J R, and Stephenson, D. 2013. The Dalradian rocks of the northern Grampian Highlands of Scotland. Proceedings of the Geologists' Association, Vol. 124, 263-317. | |||
| Robertson, S, and Smith, M. 1999. The significance of the Geal Charn-Ossian steep belt in basin development in the central Scottish Highlands. Journal of the Geological Society, Vol. 156, 1175-1182. | |||
| Highton, A J, Hyslop, E K, and Noble, S R. 1999. U-Pb zircon geochronology of migmatization in the northern Central Highlands: evidence for pre-Caledonian (Neoproterozoic) tectonometamorphism in the Grampian block, Scotland. Journal of the Geological Society, Vol. 156, 1195-1204. | |||
| Cawood, P A, Nemchin, A A, Smith, M, and Loewy, S. 2003. Source of the Dalradian Supergroup constrained by U-Pb dating of detrital zircon and implications for the East Laurentian margin. Journal of the Geological Society, Vol. 160, 231-246. | |||
| Piasecki, M A J. 1980. New light on the Moine rocks of the Central Highlands of Scotland. Journal of the Geological Society, London, Vol. 137, p. 41 - 68. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| S074 S063 | |||