The BGS Lexicon of Named Rock Units — Result Details

Shalloch Formation

Computer Code: SLH Preferred Map Code: SLH
Status Code: Full
Age range: Pusgillian Stage (OP) — Cautleyan Stage (OU)
Lithological Description: Flaggy wacke and siltstone turbidites.
Definition of Lower Boundary: Conformable on the Mill Formation.
Definition of Upper Boundary: Conformably overlain by the Auldthorns Formation, which is part of the Drummock Subgroup.
Thickness: About 300 m thick.
Geographical Limits: Girvan area, south-west Scotland.
Parent Unit: Whitehouse Subgroup (WHE)
Previous Name(s): Barren Flagstones (-3035)
Shalloch Flagstone Formation (-4331)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Coast, Woodland Point, south of Girvan. 
Reference(s):
Harper, D A T, 1984. Brachiopods from the Upper Ardmillan succession (Ordovician) of the Girvan district, Scotland. Part 1. Monograph of the Palaeontographical Society, London. 1-78 (Publication No.565, part of Vol.136 for 1982). 
Ingham, J K, 1978. Geology of a continental margin 2: Middle and late Ordovician transgression, Girvan. "In" Bones, D R and Leake, B E. Crustal Evolution in North Western Britain and Adjacent Regions. Geological Journal Special Issue, No.10. p.163-176. 
Lapworth, C, 1882. The Girvan Succession. Quarterly Journal of the Geological Society of London, Vol. 38, 537-666. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S008 S007