| Keasey Formation | |
|---|---|
| Stratigraphic range: Priabonian-Rupelian | |
 Fossil from the Keasey Formation | |
| Type | Formation |
| Underlies | Pittsburg Bluff Formation |
| Overlies | Cowlitz Formation |
| Location | |
| Region | Oregon |
| Country |  United States |
The Keasey Formation is a geologic formation in northwestern Oregon. It preserves fossils dating back to the Paleogene period.