| Modelo Formation | |
| Type: | Formation |
| Age: | Late Miocene |
| Period: | Miocene |
| Prilithology: | Shale |
| Region: | Los Angeles County and Ventura County, California |
| Country: | United States |
| Thickness: | 600m (2,000feet) |
| Extent: | Simi Hills, Santa Susana Mountains |
The Modelo Formation is a Miocene geologic formation in the Simi Hills and western Santa Susana Mountains of southern California.
It preserves fossils dating back to the Late Miocene of the Neogene period.