The BGS Lexicon of Named Rock Units — Result Details

Bryn-Crin Basaltic Trachyandesite

Computer Code: BCBT Preferred Map Code: notEntered
Status Code: Pending Upgrade
Age range: Marshbrookian Substage (OM) — Onnian Substage (ON)
Lithological Description: Amygdaloidal basaltic trachyandesite, characterised by abundant andesine phenocrysts, glomeroporphritic clots, augite and apatite in microcrystalline groundmass.
Definition of Lower Boundary: Not applicable.
Definition of Upper Boundary: Not applicable.
Thickness: To 100m
Geographical Limits: none recorded or not applicable
Parent Unit: Not Available (!)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
none recorded or not applicable
Reference(s):
Young, T P, Gibbons, W and McCarroll, D. 2002. Geology of the country around Pwllheli. Memoir of the British Geological Survey, Sheet 134 (England and Wales). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E134