LocNo: 4331Upper Coal Measures
| Country: |
USA
|
| Province: |
Illinois, Sangamon Co.
|
| Locality: |
Springfield
|
| Layer: | Upper Coal Measures |
| Lower Boundary: |
Moscovian--Kasimovian [MOS--KAS], 306.5 million years
|
| Upper Boundary: |
Gzhelian--Asselian [C--P], 299 million years
|
| Georeference: |