The BGS Lexicon of Named Rock Units — Result Details

Aberfoyle Slate Formation

Computer Code: DCAS Preferred Map Code: ABSF
Status Code: Full
Age range: Ediacaran Period (AD) — Ediacaran Period (AD)
Lithological Description: Pelite and semipelite, grey to black in general, but purple or green locally, with thin units of coarse gritty sandstone developed locally.
Definition of Lower Boundary: Undefined; base not observed.
Definition of Upper Boundary: Outgoing of grey and black to purple slates and incoming coarse gritty and microconglomeratic arenites of the Creag Innich Sandstone Formation.
Thickness: c.500m (estimated)
Geographical Limits: Southwest of Loch Tay Fault from Loch Venachar to Loch Lomond (= to Luss Slates) and farther southwest, where known as 'Dunoon Phyllites'.
Parent Unit: Southern Highland Group (SOHI)
Previous Name(s): Aberfoyle Slate (-1487)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Abandoned slate quarries, Dukes Pass, north of Aberfoyle, Perthshire. 
Reference(s):
none recorded or not applicable
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S038 S038