| Martinez Formation | |
|---|---|
| Stratigraphic range: Eocene | |
| Type | Geologic formation |
| Underlies | Tejon Formation (regionally), Ione Formation (regionally) |
| Overlies | Chico Formation |
| Location | |
| Region | California |
| Country |  United States |
The Martinez Formation is an Eocene Epoch geologic formation in California.