| Computer Code: |
POYN |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Floian Age (OFL)
— Darriwilian Age (ODW) |
| Lithological Description: |
Pale green-grey mudstone. |
| Definition of Lower Boundary: |
Stratigraphic contact with Mynydd y Garn Formation (GARN) or unconformably upon Ordovican rocks of the Cemaes Group (CMS) or Neoproterozoic rocks, e.g. Mona Gneiss Assemblage - NMG. |
| Definition of Upper Boundary: |
Stratigraphic contact with Capel Parc Formation (CAPC). |
| Thickness: |
none recorded or not applicable
|
| Geographical Limits: |
Anglesey. |
| Parent Unit: |
Llyn Alaw Group (ALAW)
|
| 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 |
