The BGS Lexicon of Named Rock Units — Result Details

Balclatchie Formation

Computer Code: BCH Preferred Map Code: Bch
Status Code: Full
Age range: Caradoc Series (O4) — Caradoc Series (O4)
Lithological Description: Blue-grey nodular mudstone, siltstone and impersistent conglomerate units.
Definition of Lower Boundary: Rests conformably on Benan Conglomerate (Barr Group).
Definition of Upper Boundary: Overlain conformably by the Ardwell Formation.
Thickness: c.300m
Geographical Limits: Girvan District, southwest Scotland.
Parent Unit: Ardwell Subgroup (AWL)
Previous Name(s): Balclatchie Conglomerate [Obsolete Name And Code: Use BCH] (BBCG)
Balclatchie Group (-2584)
Balclatchie Beds (-3823)
Balclatchie Mudstones [Obsolete Name And Code: Use BCH] (BBM)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  Coast at Kennedy's Pass, Girvan. 
Type Section  Penwhapple Burn, Balclatchie Bridge. 
Type Section  Sheet SO07 
Reference(s):
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. 
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. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S007 S008