| Computer Code: |
HEN |
Preferred Map Code: |
Hen |
| Status Code: |
Pending Upgrade |
| Age range: |
Telychian Age (ST)
— Telychian Age (ST) |
| Lithological Description: |
Pebbly mudstones, conglomerates and sandstones. Rapid lateral facies changes common. |
| Definition of Lower Boundary: |
Disconformably overlies Ashgill Formation. |
| Definition of Upper Boundary: |
Gradational but taken at base of first thick mudstone unit above the sandstones and conglomerates of the formation. |
| Thickness: |
15-80 metres. |
| Geographical Limits: |
Central Wales. |
| Parent Unit: |
Not Applicable (-)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Quarry, 300 metres north-north-east of Henfryn, Abbeycwmhir. |
| Reference(s): |
| none recorded or not applicable |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E179
|
