| Prosser Limestone | |
|---|---|
| Stratigraphic range: Ordovician | |
| Type | Formation |
| Sub-units | Clitambonites Member |
| Location | |
| Region |  Illinois  Wisconsin  Iowa Manitoba |
| Country |  United States  Canada |
The Prosser Limestone is a geologic formation in Illinois, USA. It preserves fossils dating back to the Ordovician period.
