| Winfield Formation | |
|---|---|
| Stratigraphic range: Permian | |
| Type | Formation |
| Unit of | Chase Group |
| Sub-units | Grant Shale Member |
| Location | |
| Region | Nebraska, Kansas, Oklahoma |
| Country | United States |
The Winfield Formation is a geologic formation in Nebraska. It preserves fossils dating back to the Permian period.