The BGS Lexicon of Named Rock Units — Result Details

Locherben Breccia Formation

Computer Code: LOC Preferred Map Code: Loc
Status Code: Full
Age range: Cisuralian Epoch (PLC) — Cisuralian Epoch (PLC)
Lithological Description: Well sorted sandy breccia with clasts of bladed greywacke, argillite and purple amygdaloidal basalt.
Definition of Lower Boundary: Rests on thin sequence of Carron Basalt Formation.
Definition of Upper Boundary: Passes up by alternation into aeolian desert dune sandstone of the Thornhill Sandstone Formation.
Thickness: 50m
Geographical Limits: Locherben Outlier approximately 2km sq.
Parent Unit: Stewartry Group (STEW)
Previous Name(s): Permian Breccias (Undivided) (-875)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  450m south-east of Locherben. 
Reference(s):
Brookfield, M E, 1978. Revision of the Stratigraphy of Permian and Supposed Permian Rocks of Southern Scotland. Geologische Rundschau, Vol.67, p.110-143. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S009