Computer Code: |
BONA |
Preferred Map Code: |
notEntered |
Status Code: |
Full |
Age range: |
Ediacaran Period (AD)
— Ediacaran Period (AD) |
Lithological Description: |
Contact metamorphosed laminated semipelite and quartzite, latter locally cross-bedded. |
Definition of Lower Boundary: |
Stratigraphic contact with underlying Gwalchmai Formation (GWALC). |
Definition of Upper Boundary: |
Unconformably overlain by Ordovician rocks, eg. Llyn Alaw Group (ALAW). |
Thickness: |
none recorded or not applicable
|
Geographical Limits: |
Anglesey. |
Parent Unit: |
Llynn Maelog Group (LMG)
|
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 |