The BGS Lexicon of Named Rock Units — Result Details

Craighead Volcanic Formation

Computer Code: CRV Preferred Map Code: CRV
Status Code: Full
Age range: Abereiddian Stage (O2) — Caradoc Series (O4)
Lithological Description: Basaltic pillow lava, with associated bedded chert.
Definition of Lower Boundary: Lower boundary not seen.
Definition of Upper Boundary: Unconformably overlain by the Craighead Limestone Formation.
Thickness: At least 500 m thick.
Geographical Limits: Craighead Inlier, Girvan.
Parent Unit: Not Applicable (-)
Previous Name(s): Arenig Ballantrae Volcanic Complex (Assumed To Be Part Of) (-2124)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  The northern, western and eastern slopes of Craighead Hill, Girvan. 
Reference(s):
Lamont, A, and Lindstrom, M, 1957. Arenigian and Llandeilian cherts identified in the Southern Uplands by means of conodonts, etc., Transactions of the Edinburgh Geological Society, Vol. 17, 60-70. 
Peach, B N and Horne, J. 1899. The Silurian Rocks of Britain, Volume 1. Scotland. Memoir of the Geological Survey of the United Kingdom. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S014 S008