The BGS Lexicon of Named Rock Units — Result Details

Traboyack Formation

Computer Code: TRA Preferred Map Code: TRA
Status Code: Full
Age range: Abereiddian Stage (O2) — Caradoc Series (O4)
Lithological Description: Red-purple sandstones, mudstones and conglomerates with high magnetic susceptibility.
Definition of Lower Boundary: Faulted contacts.
Definition of Upper Boundary: Faulted contacts.
Thickness: Up to about 1200 m thick.
Geographical Limits: Not defined.
Parent Unit: Tappins Group (TAP)
Previous Name(s): Traboyack Division (-580)
Alternative Name(s): none recorded or not applicable
Type Area  Traboyack, Sheet S008W. 
Floyd, J D, 1996. Lithostratigraphy of the Ordovician rocks in the Southern Uplands: Crawford Group, Moffat Shale Group, Leadhills Supergroup. Transactions of the Royal Society of Edinburgh: Earth Sciences, Vol.86, 153-165. 
Williams, A, 1962. The Barr and Lower Ardmillan Series (Caradoc) of the Girvan district, southwest Ayrshire, with descriptions of the Brachiopoda. Memoir of the Geological Society of London, No.3. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S008 S007