| Computer Code: |
SPOT |
Preferred Map Code: |
SPOT |
| Status Code: |
Full |
| Age range: |
Caradoc Series (O4)
— Caradoc Series (O4) |
| Lithological Description: |
Intrabasinal rudite. |
| Definition of Lower Boundary: |
At the base of the predominantly rudaceous beds containing intrabasinal clasts of greywacke, chert, black mudstone and volcanic rock, within the Kirkcolm Formation. |
| Definition of Upper Boundary: |
The top of the predominantly rudaceous beds, within the Kirkcolm Formation. |
| Thickness: |
100-800m |
| Geographical Limits: |
North east of Bail Hill Volcanic Group, within the Kirkcolm Formation, north of Sanquhar, Dumfries, Scotland. |
| Parent Unit: |
Kirkcolm Formation (KKF)
|
| Previous Name(s): |
Spothfore Formation [Obsolete Name and Code: Use SPOT]
(-3690)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Kiln Burn, 4.5km north west of Sanquhar |
| Reference(s): |
| Hepworth, B C, Oliver, G J H and McMurtry, M J, 1982. Sedimentology, volcanism, structure and metamorphism of the northern margin of a Lower Paleozoic accretionary complex; Bail Hill - Abington area of the Southern Uplands of Scotland in: Leggett, J K (Editor).Trench-forearc geology: Sedimentation and Tectonics on modern and ancient active plate margins, p.521-534. Geological Society of London, Special Publication, No.10. |
| McMurtry, M J, 1980. The Ordovician rocks of the Bail Hill area, Sanquhar, south Scotland. Volcanism and sedimentation in the Iapetus Ocean. Unpublished PhD thesis (University of St. Andrews). |
| 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: |
|
S015
S015
|
