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 Group (-3801)
Middle Ardwell Beds [Obsolete Name And Code: Use ARD] (ARBM)
Ardwell Beds, Middle (-648)
Ardwell Formation (-649)
Alternative Name(s): none recorded or not applicable
Type Section  Coast section between Ardwell Bay and Kennedy's Pass. 
Type Area  Sheet 007, Girvan. 
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. 
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. 
Lapworth, C, 1882. The Girvan Succession. Quarterly Journal of the Geological Society of London, Vol. 38, 537-666. 
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, 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. 
Williams, A, 1959. A structural history of the Girvan district south-west Ayrshire. Transactions of the Royal Society of Edinburgh, Vol 63, p 631. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S008 S007