Santa Susana Formation
| Santa Susana Formation | |
|---|---|
| Stratigraphic range: Late Paleocene-Early Eocene | |
| Type | Formation |
| Underlies | Meganos Formation |
| Overlies | Martinez Formation |
| Thickness | 1,000–1,500 ft (300–460 m) |
| Lithology | |
| Primary | Shale |
| Other | Sandstone, conglomerate |
| Location | |
| Region | Los Angeles County and Ventura County, California |
| Country | United States |
| Extent | Simi Hills, Santa Susana Mountains |
| Type section | |
| Named for | Santa Susana, California |
The Santa Susana Formation is a Paleogene period geologic formation in the Simi Hills and western Santa Susana Mountains of southern California.
The formation consists largely of light-gray shale and some fine-grained shaly sandstone, with a lens of heavy conglomerates in the lower part. Small beds of limestone are also present. It is from 1,000–1,500 feet (300–460 m) thick.