The BGS Lexicon of Named Rock Units — Result Details

Meall Garbh Psammite And Semipelite Formation

Computer Code: MGPS Preferred Map Code: notEntered
Status Code: Pending Upgrade
Age range: Neoproterozoic Era (AZ) — Neoproterozoic Era (AZ)
Lithological Description: An undifferentiated, regularly bedded sequence of banded to laminated psammite, with thick units of semipelite and some pelite. Decimetre-scale beds of impure quartzite are common close to the base of the overlying unit, seen as part of the transitional change upwards. Pebbly and gritty beds are uncommon, and cross-lamination is rarely seen.
Definition of Lower Boundary: Undefined, not yet mapped.
Definition of Upper Boundary: Boundary defined on first occurrence of grey to white quartzite.
Thickness: Unknown.
Geographical Limits: Crianlarich Sheet 46W (Scotland).
Parent Unit: Grampian Group (GRAM)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
none recorded or not applicable
none recorded or not applicable
1:50K maps on which the lithostratigraphical unit is found, and map code used: