LocNo: 893terebratum Zone
| Country: |
Great Britain
|
| Province: |
England,Cornwall
|
| Locality: |
Portquin
|
| Layer: | terebratum Zone |
| Lower Boundary: |
ensensis--hemiansatus Zone [08,20], 391.8 million years
|
| Upper Boundary: |
mid.--up.varcus Zone [17,00], 389 million years
|
| Georeference: |