The BGS Lexicon of Named Rock Units — Result Details

Creag Buidhe Semipelite Formation

Computer Code: CGBH Preferred Map Code: CB
Status Code: Full
Age range: Tonian Period (AT) — Tonian Period (AT)
Lithological Description: Gneissose to migmatitic semipelite, locally muscovitic and garnetiferous; minor and local lenses of quartzite and units of micaceous psammite. Main lithology: gneissose semipelite (SPELGN); trace lithology: quartzite (QZITE), micaceous psammite (PSAMI).
Definition of Lower Boundary: Not exposed - interbanded with psammites of the Dava Subgroup (undifferentiated).
Definition of Upper Boundary: Conformable contact with the structurally overlying Beinn Bhreac Psammite Formation - no way-up criteria.
Thickness: none recorded or not applicable
Geographical Limits: Central Highlands of Scotland, SE of Loch Ness. Strathnairn to Slochd area.
Parent Unit: Dava Subgroup (DAVA)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Creag Bhuidhe summit area and NE ridge. 
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). 
British Geological Survey. 2004. Tomatin. Scotland Sheet 74W. Bedrock Geology. 1:50 000 Geology Series (Keyworth, Nottingham: BGS) 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S074 S074