The BGS Lexicon of Named Rock Units — Result Details

Creag Leacach Quartzite Formation

Computer Code: CLQU Preferred Map Code: symb
Status Code: Full
Age range: Neoproterozoic Era (AZ) — Neoproterozoic Era (AZ)
Lithological Description: White quartzite lenses succeeded upwards by cream quartzite and micaceous psammite.
Definition of Lower Boundary: Base of dominantly quartzite succession overlying dominantly graphitic succession of the Blair Atholl Subgroup. Base of boulder bed, where developed.
Definition of Upper Boundary: Top of dominantly quartzitic succession below dominantly graphitic succession of the overlying Ben Eagach Schist Formation.
Thickness: Not known
Geographical Limits: Braemar, Ballater and Glen Shee districts.
Parent Unit: Islay Subgroup (DBIS)
Previous Name(s): Creag Leacach Quartzite (-3308)
Alternative Name(s): Schiehallion Quartzite
Stratotypes:
Type Area  Creag Leacach 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. 
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. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S065 S065 S056