LocNo: 3698Sparland Fm. of McLeansboro group
| Country: |
USA
|
| Province: |
Illinois, Sangamon Co.
|
| Locality: |
Rolls Ford
|
| Layer: | Sparland Fm. of McLeansboro group |
| Lower Boundary: |
UTX Graford Fm.--Brad Fm., 305.3 million years
|
| Upper Boundary: |
UTX Graham Fm. top, 301 million years
|
| Georeference: |