| Rockford Limestone | |
|---|---|
| Stratigraphic range: Mississippian | |
| Type | Formation |
| Underlies | New Providence Shale |
| Overlies | New Albany Shale |
| Location | |
| Region |  Illinois  Indiana  Kentucky |
| Country |  United States |
The Rockford Limestone is a geologic formation in Indiana. It preserves fossils dating back to the Carboniferous period.