Computer Code: |
TWYN |
Preferred Map Code: |
notEntered |
Status Code: |
Full |
Age range: |
Darriwilian Age (ODW)
— Darriwilian Age (ODW) |
Lithological Description: |
Interbedded sandstone and conglomerate. |
Definition of Lower Boundary: |
Conformably overlying Porth Cynfor Formation (CYNFO). |
Definition of Upper Boundary: |
Unconformably overlain by Llanbadrig Formation (LLBG). |
Thickness: |
none recorded or not applicable
|
Geographical Limits: |
Anglesey. |
Parent Unit: |
Porth Wen Group (PORW)
|
Previous Name(s): |
none recorded or not applicable
|
Alternative Name(s): |
none recorded or not applicable
|
Stratotypes: |
none recorded or not applicable |
Reference(s): |
Bates, D E B. 1972. The stratigraphy of the Ordovician rocks of Anglesey. Geological Journal, 8(1), 29-58. |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
none recorded or not applicable |