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| Santa Margarita Formation | |
|---|---|
| Stratigraphic range: Neogene | |
 Fossil from the Santa Margarita Formation | |
| Type | Formation |
| Underlies | Chanac Formation |
| Location | |
| Region | San Joaquin Valley, California |
| Country | United States |
The Santa Margarita Formation is a Neogene Period geologic formation in the San Joaquin Valley of central California.