The BGS Lexicon of Named Rock Units — Result Details

Holyhead Quartzite

Computer Code: NHQ Preferred Map Code: notEntered
Status Code: Index Level
Age range: Ediacaran Period (AD) — Ediacaran Period (AD)
Lithological Description: none recorded or not applicable
Definition of Lower Boundary: none recorded or not applicable
Definition of Upper Boundary: none recorded or not applicable
Thickness: none recorded or not applicable
Geographical Limits: none recorded or not applicable
Parent Unit: Holyhead Formation (HHD)
Previous Name(s): Holyhead Quartzite Formation (-3579)
Alternative Name(s): none recorded or not applicable
Stratotypes:
none recorded or not applicable
Reference(s):
Phillips E. 1991. The lithostratigraphy, sedimentology and tectonic setting of the Monian Supergroup, western Anglesey, North Wales. Journal of the Geological Society, London, Vol. 148, 1079-1090. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable