The BGS Lexicon of Named Rock Units — Result Details

Strumble Head Volcanic Formation

Computer Code: SHV Preferred Map Code: SHV
Status Code: Pending Upgrade
Age range: Abereiddian Stage (O2) — Abereiddian Stage (O2)
Lithological Description: Basaltic pillow lavas, spilitic breccias, ashes and intercalated sediments.
Definition of Lower Boundary: Not defined.
Definition of Upper Boundary: Not defined.
Thickness: Up to 1500 metres.
Geographical Limits: 1:50 000 Sheet 209 (St. Davids) and adjacent Sheet 210.
Parent Unit: Fishguard Volcanic Group (FIV)
Previous Name(s): Pillow Lava Division (-4325)
Alternative Name(s): none recorded or not applicable
Stratotypes:
none recorded or not applicable
Reference(s):
Bevins, R E, and Roach, R A. 1980. Early Ordovician Volcanism in Dyfed, south-west Wales. "In" Harris, A Land others. The Caledonides of the British Isles Reviewed. Geological Society Special Publication, No.8, p.603-609. 
Thomas, G E and Thomas, T M. 1956. The volcanic rocks of the area between Fishguard and Strumble Head, Pembrokeshire. Quarterly Journal of the Geological Society, Vol.112, 291-314. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E209 E210