The BGS Lexicon of Named Rock Units — Result Details
Gleann Beag Schist Formation
Computer Code: | GBSC | Preferred Map Code: | symb |
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Status Code: | Full | ||
Age range: | Neoproterozoic Era (AZ) — Neoproterozoic Era (AZ) | ||
Lithological Description: | Mostly dark metacarbonate rock and psammite with some graphitic pelite and garnet calcareous schist passing up into graphitic pelite with thin beds of metacarbonate rock. | ||
Definition of Lower Boundary: | Base of dominantly calcareous and graphitic rocks. Stratigraphic boundary with the underlying dominantly semipelitic Tulaichean Schist Formation. | ||
Definition of Upper Boundary: | Top of dominantly graphitic rocks below the overlying dominantly quartzite succession of the Creag Leacach Quartzite Formation. | ||
Thickness: | To 550m | ||
Geographical Limits: | Southern part of Sheet 65W (Braemar) and northern part of sheet 56W (Glen Shee). | ||
Parent Unit: | Blair Atholl Subgroup (DABA) | ||
Previous Name(s): | Blair Atholl Dark Limestone and Dark Schist [Obsolete Name and Code: Use GBSC]
(-4666)
Glen Beag Schist [Obsolete Name and Code: Use GBSC] (-3417) |
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Alternative Name(s): | none recorded or not applicable | ||
Stratotypes: | |||
Type Area | Gleann Beag area. | ||
Reference(s): | |||
Crane, A, Goodman, S, Krabbendam, M K, Leslie, A G, Paterson, I B, Robertson, S and Rollin, K, 1996. Geology of the Glen Shee district. Memoir of the British Geological Survey, Sheet 56W and adjacent areas (Scotland). | |||
Upton, P S. 1986. A structural cross-section of the Moine and Dalradian rocks of the Braemar area. Report of the British Geological Survey, Vol.17, No.1, 9-19. | |||
1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
S056 S065 |