The BGS Lexicon of Named Rock Units — Result Details

Creag An Loin Psammite Formation

Computer Code: CRAN Preferred Map Code: LO
Status Code: Full
Age range: Tonian Period (AT) — Tonian Period (AT)
Lithological Description: Interbanded psammite and micaceous psammite, siliceous psammite, quartzite and semipelite.
Definition of Lower Boundary: Not exposed in the Laggan Inlier.
Definition of Upper Boundary: Defined by the incoming of a predominantly semipelite succession which is transitional into the overlying An Stac Semipelite and Psammite Formation.
Thickness: Up to 200 m exposed.
Geographical Limits: Central Highlands of Scotland. Glen Banchor and Kincraig inliers.
Parent Unit: Glen Banchor Subgroup (GLBA)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Northern Glen Banchor from Creag an Loin to meltwater channel at Allt an Sluicha Bhig. 
Reference Section  Eastern flanks of Sron Beag na H-uamhaidh. 
Reference(s):
none recorded or not applicable
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S063 S064 S074