| San Joaquin Formation | |
|---|---|
| Stratigraphic range: Neogene | |
| Type | Geologic formation |
| Underlies | Tulare Formation |
| Overlies | Etchegoin Formation |
| Location | |
| Region | San Joaquin Valley, California |
| Country | United States |
The San Joaquin Formation is a Pliocene epoch geologic formation in the lower half of the San Joaquin Valley in central California.[1]