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
|
Stratotypes: |
Type Area |
Traboyack, Sheet S008W. |
Reference(s): |
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. |
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. |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
S008
S007
|