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 (-1313)
Ardwell Beds, Middle (-648)
Ardwell Formation (-649)
Middle Ardwell Beds [Obsolete Name And Code: Use ARD] (ARBM)
Ardwell Group (-3801)
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):
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. 
Cameron, I B, Stone, P and Smellie, J, 1986. Geology of the Country around Girvan. Explanation of 1:50 000 sheet. British Geological Survey, Sheet 7, Scotland. 
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. 
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. 
Williams, A, 1959. A structural history of the Girvan district south-west Ayrshire. Transactions of the Royal Society of Edinburgh, Vol 63, p 631. 
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. 
Henderson, S M K, 1935. Ordovician submarine disturbances in the Girvan district. Transactions of the Royal Society of Edinburgh, Vol 58, p 488. 
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