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
|