The BGS Lexicon of Named Rock Units — Result Details

Carmel Head Gneiss Package

Computer Code: COEDC Preferred Map Code: notEntered
Status Code: Full
Age range: Ediacaran Period (AD) — Ediacaran Period (AD)
Lithological Description: Biotite, sillimanite and garnet-bearing pelitic, semipelitic, quartzo-feldspathic gneiss. Mafic gneiss occurs locally as pods within quartzo-feldspathic gneiss.
Definition of Lower Boundary: Tectonic contacts / unknown.
Definition of Upper Boundary: Unconformably overlain by Ordovician rocks, eg. Cemaes Group (CMES) and Llyn Alaw Group (ALAW) rocks.
Thickness: none recorded or not applicable
Geographical Limits: Anglesey.
Parent Unit: Mona Gneiss Suite (NMG)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
none recorded or not applicable
Reference(s):
none recorded or not applicable
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable