| Computer Code: |
BMD |
Preferred Map Code: |
BMd |
| Status Code: |
Pending Upgrade |
| Age range: |
Wenlock Epoch (SW)
— Wenlock Epoch (SW) |
| Lithological Description: |
Laminated silty mudstones. |
| Definition of Lower Boundary: |
In-coming of pervasively laminated silty mudstones gradationally overlying the Dolfawr Mudstones, or sharply overlying the Alpine Bridge Member of the Cerig Formation. |
| Definition of Upper Boundary: |
Not yet diagnosed. |
| Thickness: |
Not yet assessed. |
| Geographical Limits: |
Central Wales and Welsh Borders. |
| Parent Unit: |
Not Applicable (-)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
River Wye north west of Builth Wells, from 300 metres below railway bridge up river for 3km. |
| Reference(s): |
| none recorded or not applicable |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E196
E179
|
