| Otay Formation Stratigraphic range: Oligocene-Miocene | |
|---|---|
| Type | Formation |
| Overlies | Sweetwater Formation |
| Location | |
| Region | California Baja California |
| Country |  United States  Mexico |
The Otay Formation is a geologic formation in San Diego County, California (United States) and northern Baja California state (Mexico). [1] [2] It is within the Peninsular Ranges province. [1]
It preserves fossils of the Oligocene to Miocene periods of the Cenozoic Era. [1] Fossils in the Sweetwater Formation that underlies the Otay Formation are of the Late Eocene period. [1]
The Benevides Formation is a geologic formation in Texas and Mexico. It preserves fossils dating back to the Cretaceous period.
The Ely Springs Dolomite is an Ordovician period geologic formation in the Southwestern United States.
The Merced Formation is a geologic formation in California, and also in Oregon and Washington state. It is named for Lake Merced, a natural lake on the western San Francisco coastline.
The Cajon Valley Beds is a sedimentary geologic formation in the El Cajon Valley of southwestern San Diego County, California.
The Chanac Formation is a Cenozoic Era sandstone geologic formation in the southeastern San Joaquin Valley, within Kern County, California.
The Topanga Canyon Formation is a Miocene epoch geologic formation in the Santa Monica Mountains, Simi Hills, Santa Ana Mountains and San Joaquin Hills, in Los Angeles County, Ventura County, and Orange County, southern California. It is primarily composed of hard sandstone with some inter-bedded siltstone.
The Santa Margarita Formation is a Neogene Period geologic formation in the San Joaquin Valley of central California.
The Friars Formation is a geologic formation in San Diego County, Southern California.
The La Jolla Group is a group of geologic formations in coastal southwestern San Diego County, Southern California. Its locations include the coastal La Jolla San Diego region.
The Mission Valley Formation is a marine sandstone geologic formation in the Mission Valley region of southwestern San Diego County in Southern California.
The Pomerado Conglomerate Formation is a geologic formation in southwestern San Diego County, California.
The Poway Group is a geologic group in San Diego County, Southern California. It preserves fossils dating back to the Paleogene period.
The Scripps Formation is a geologic formation in coastal San Diego County, California.
The Stadium Conglomerate is a geologic formation in San Diego County, California. It is found at the northern end of Mission Valley near San Diego Stadium.
The Sweetwater Formation is a geologic formation in California. It preserves fossils dating back to the Paleogene period.
The Brawley Formation is a geologic formation in the Colorado Desert of southern California, located in northwestern Imperial County and eastern San Diego County.
The Palm Spring Formation is a Pleistocene Epoch geologic formation in the eastern Colorado Desert of Imperial County and San Diego County County, Southern California.
The Ocotillo Formation is a Pliocene fluvial-alluvial fan geologic formation in the Colorado Desert of Southern California.
The Rosario Group is a Late Cretaceous geologic group in southwestern California and northwestern Baja California (Mexico). In older literature it was named Rosario Formation.
The Imperial Formation is the name of two distinct and unrelated geologic formations in North America, of different geologic Eras.
