LocNo: 6797Allegheny group, Columbiana unit
| Country: |
USA
|
| Province: |
Ohio, Columbiana Co.
|
| Locality: |
Perry Township, Brookwood mine.
|
| Layer: | Allegheny group, Columbiana unit |
| Lower Boundary: |
U Atokan--Desmoinesian [ATO--DES], 308.6 million years
|
| Upper Boundary: |
U Desmoinesian--Missourian [DES--MIS], 306.5 million years
|
| Georeference: |