The BGS Lexicon of Named Rock Units — Result Details

Mashie Semipelite Formation

Computer Code: MSSP Preferred Map Code: M
Status Code: Full
Age range: Neoproterozoic Era (AZ) — Neoproterozoic Era (AZ)
Lithological Description: Semipelite, schistose to gneissose.
Definition of Lower Boundary: Tectonic contact with the Glen Banchor Succession.
Definition of Upper Boundary: Gradational boundary into the Fara Psammite Formation placed where psammite becomes the dominant lithology.
Thickness: Unknown. May be up to 100m
Geographical Limits: In Spey Valley adjacent to Laggan Village in Dalwhinnie district. [Scotland sheet 63E].
Parent Unit: Corrieyairack Subgroup (GRCO)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  On crags 2km ESE of Strathmashie House. 
Reference(s):
British Geological Survey, 2000. Dalwhinnie, Scotland. Sheet 63E. Solid Geology 1:50000. [Keyworth, Nottingham: British Geological Survey]. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S063