| Computer Code: |
LND |
Preferred Map Code: |
notEntered |
| Status Code: |
Pending Upgrade |
| Age range: |
Abereiddian Stage (O2)
— Abereiddian Stage (O2) |
| Lithological Description: |
Massive to thinly bedded and laminated, rhyolitic, ash-flow and turbiditic lapilli tuffs and tuffaceous sediments, including a basal conglomerate. |
| Definition of Lower Boundary: |
Unconformity [local] on Middle Cambrian sediments [Trwyn Llundain Formation - Solva Group]. |
| Definition of Upper Boundary: |
Not seen. |
| Thickness: |
600m+ |
| Geographical Limits: |
Not specified. |
| Parent Unit: |
Not Available (!)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| none recorded or not applicable |
| Reference(s): |
| Kokelaar, B P, Bevins, R E and Roach, R A. 1985. Submarine silicic volcanism and associated sedimentary and tectonic processes, Ramsey Island, south west Wales. Journal of the Geological Society of London, Vol.142 (4-6), 591-617. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E209
|
