| 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.[1][2][3]
The formation consists largely of light-gray shale and some fine-grained shaly sandstone, with a lens of heavy conglomerates in the lower part.[1][4] Small beds of limestone are also present.[5] It is from 1,000–1,500 feet (300–460 m) thick.[1][4]
- ^ a b c USGS.gov: Geolex - Santa Susana Formation; accessed 8.15.2015
- ^ "A summary of work in progress on the Tertiary and Quaternary of western North America"; Clark, B.L.; Pan-Pacific [2nd] Science Congress Proceedings, Australia, v. 1, p. 874-879 (1924); accessed 8.15.2015.
- ^ "A contribution to the paleontology of the Martinez Eocene of California"; Nelson, R. N.; University of California Publications in Geological Sciences v. 15, no. 11 (1925); [p. 397-466]; accessed 8.15.2015.
- ^ a b USGS.gov: "Preliminary geologic map of the Santa Susana quadrangle, Southern California"; R. F. Yerkes1 and R. H. Campbell; accessed 8.15.2015.
- ^ Campbell, R.H., Wills, C.J., Irvine, P.J., and Swanson, B.J., 2016. Preliminary geologic map of the Los Angeles 30' x 60' quadrangle, California.Version 2.1, California Geological Survey, Preliminary Geologic Maps PGM-13-06 https://ngmdb.usgs.gov/mapview/?center=-118.371,34.313&zoom=10