The BGS Lexicon of Named Rock Units — Result Details

Ardwell Farm Formation

Computer Code: ARD Preferred Map Code: ARD
Status Code: Full
Age range: Caradoc Series (O4) — Caradoc Series (O4)
Lithological Description: Flaggy wacke.
Definition of Lower Boundary: Rests conformably on Balclatchie Formation.
Definition of Upper Boundary: Underlies the Whitehouse Subgroup (not seen, faulted out).
Thickness: c.1000m
Geographical Limits: Girvan district, southwest Scotland.
Parent Unit: Ardwell Subgroup (AWL)
Previous Name(s): ARDWELL FLAGS
ARDWELL GROUP
ARDWELL BEDS, MIDDLE (ARBM)
ARDWELL FORMATION (ARD)
MIDDLE ARDWELL BEDS (ARBM)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Coast section between Ardwell Bay and Kennedy's Pass. 
Type Area  Sheet 007, Girvan. 
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. 
Williams, G B and Spray, J G. 1979. Non-cylindrical, flexural slip folding in the Ardwell Flags: a statistical approach. Tectonophysics, Vol.58, 269-277. 
Tripp, R P, 1980. Trilobites from the Ordovician Balclatchie and Lower Ardwell Groups of the Girvan district, Scotland. Transactions of the Royal Society of Edinburgh. Earth Sciences, Vol 71, p. 123-145. 
Cameron, I B and others, 1986. Geology of the country around Girvan. Memoirs of the British Geological Survey, Sheet 7. (Scotland). 
Williams, A, 1959. A structural history of the Girvan district south-west Ayrshire. Transactions of the Royal Society of Edinburgh, Vol 63, p 631. 
Lapworth, C, 1882. The Girvan succession, Part 1, Stratigraphy. Quarterly Journal of the Geological Society, Vol 38, p. 585,587,594-596,661. 
Henderson, S M K, 1935. Ordovician submarine disturbances in the Girvan district. Transactions of the Royal Society of Edinburgh, Vol 58, p 488. 
Ingham, J K, 1978. Geology of a Continental Margin 2: Middle and Late Ordovician Trannsgression, Girvan. Geological Journal Special Issue, Vol.10, p.163-176. 
Fortey, R A, Harper, D A T, Ingham, J K, Owen, A W, Parkes, M A, Rushton, A W A and Woodcock, N H. 2000. A revised correlation of Ordovician rocks in the British Isles. Geological Society Special Report, No.24, pp.41-47. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S008 S007