The BGS Lexicon of Named Rock Units — Result Details

The Fara Psammite Formation

Computer Code: TFPS Preferred Map Code: TF
Status Code: Full
Age range: Neoproterozoic Era (AZ) — Neoproterozoic Era (AZ)
Lithological Description: Micaceous and feldspathic psammites, in graded beds with thin semipelite bed tops. Minor semipelite beds.
Definition of Lower Boundary: Base of dominantly psammitic succession above an underlying semipelite. Change to dominantly psammites.
Definition of Upper Boundary: Not seen.
Thickness: 1km to 1.5km
Geographical Limits: Central Highlands of Scotland between Loch Ericht, Ardverikie Forest and the Upper Spey Valley.
Parent Unit: Corrieyairack Subgroup (GRCO)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Type Area  Exposures around The Fara, notably on its southeastern flank. 
Robertson, S and Mendum, J R, in press. Lithostratigraphy of the Grampian and Appin Groups in the Dalwhinnie district, sheet 63E, Scotland. British Geological Survey Technical Report. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S063 S054