The BGS Lexicon of Named Rock Units — Result Details

Kirkmaiden Formation

Computer Code: KMN Preferred Map Code: KMN
Status Code: Pending Upgrade
Age range: Llandovery Epoch (SL) — Llandovery Epoch (SL)
Lithological Description: Greywackes (beds dominantly less than 0.5 metres thick) with mudstone interbeds. Strata to north much more thickly bedded with substantial proportions of massive arenite. Strata to south (Carghidown Formation) distinguished by presence of red mudstone beds.
Definition of Lower Boundary: 'Lower' (Northern) boundary not seen.
Definition of Upper Boundary: "Upper" (Southern) boundary gradational into Carghidown Formation.
Thickness: c.6000 metre section, strata steeply dipping but intensely folded and faulted. Stratigraphic thickness could be as little as 1 - 2 km.
Geographical Limits: Not defined.
Parent Unit: Hawick Group (HWK)
Previous Name(s): Kirkmaiden Beds (-4129)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  All strata from Black Rocks, Monreith to Hill of Glosserton. 
Reference(s):
Rust, B R. 1965. The stratigraphy and structure of the Whithorn area of Wigtownshire, Scotland. Scottish Journal of Geology, Vol.1, Part 2, p.101-133. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S002 S004