| Computer Code: |
PWGP |
Preferred Map Code: |
notEntered |
| Status Code: |
Full, pending ratification |
| Age range: |
Caradoc Series (O4)
— Caradoc Series (O4) |
| Lithological Description: |
Shales and mudstones with bands of green micaceous grit. |
| Definition of Lower Boundary: |
Drawn at the base of the Pwll-Y-Glo Group where it rests conformably upon the Trilobite Dingle Shales. |
| Definition of Upper Boundary: |
Drawn at the conformable upward passage from the Pwll-Y-Glo Group to the micaceous grits of the Gaerfawr Group. |
| Thickness: |
100 metres approx. |
| Geographical Limits: |
Welshpool. |
| Parent Unit: |
Not Entered (?)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Welshpool, Powys. |
| Reference(s): |
| Wade, A, 1911. The Llandovery and associated rocks of north-eastern Montgomeryshire. Quarterly Journal of the Geological Society of London. Vol.67, p.419,428-431. |
| Bancroft, B B. 1933. Correlation Tables of the stages Costonian - Onnian in England and Wales. Published by the author, Blakeney, Glos. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
