| Computer Code: |
MAE |
Preferred Map Code: |
MAE |
| Status Code: |
Full |
| Age range: |
Ashgill Series (OA)
— Ashgill Series (OA) |
| Lithological Description: |
[Obsolete: use MFN] Grey to bluish grey siltstones with subordinate grey, light grey, yellow and white fine-grained sandstones and siltstone laminae which are parallel or ripple-laminated. Bioturbated. Rare macrofauna. Includes Dinas Sandstone Member at top of formation. |
| Definition of Lower Boundary: |
Unconformable on various Caradoc Formations. |
| Definition of Upper Boundary: |
The Dinas Sandstone Member is overlain by pale grey siltstones of the Bettws Mudstone or Bron-y-Graig Formations. |
| Thickness: |
1600 metres. Lateral variations, 1000 metres - 1600 metres. |
| Geographical Limits: |
Not defined. |
| Parent Unit: |
none recorded or not applicable
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Corwen Sheet 120. |
| Reference(s): |
| Alder, K E. 1976. The geology of an area around Bettws Gwerfil Goch and Melin-y-Wig. Unpublished PhD Thesis, University of Cambridge. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E120
|
