| Country: |
USA
|
| Province: |
Iowa (undifferentiated)
|
| Locality: |
Des Moines
|
| Layer: | Middle Coal Measures |
| Lower Boundary: |
U Atokan--Desmoinesian [ATO--DES], 308.6 million years
|
| Upper Boundary: |
Moscovian--Kasimovian [MOS--KAS], 306.5 million years
|
| Georeference: |