| San Benito Gravels | |
|---|---|
| Stratigraphic range: Quaternary | |
| Type | Geologic formation |
| Location | |
| Region | San Benito County, California |
| Country | United States |
| Type section | |
| Named for | Lake San Benito (prehistoric) |
The San Benito Gravels is a Quaternary Epoch geologic formation in California.
The Pleistocene Period Lake San Benito and others were formed in the prehistoric Pajaro River-San Benito River basin. The lakes were along 10 miles (16 km) on each side of the San Andreas Fault, the movements of which were responsible for the formation of those lakes. [1]
The Purisima Formation surrounds the San Benito Gravels, and was a primary source of the silt and gravels deposited in them. [1]
The present day San Benito River cuts a channel through the formation.
The San Benito Gravels formation preserves Cenozoic Era non−marine fossils. [2]
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The Wiota Gravels is a geologic formation in Montana. It preserves fossils dating to the Pleistocene.
The Alamosa Formation is a geologic formation in Colorado. It preserves fossils. The formation was deposited by Lake Alamosa, a paleolake that existed from the Pliocene to the middle Pleistocene.
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 Ringold Formation is a geologic formation in Eastern Washington, United States. The formation consists of sediment laid down by the Columbia River following the flood basalt eruptions of the Columbia River Basalt Group reaching up to 1,000 feet (300 m) thick in places. It preserves fossils dating back to the Neogene period.
The Mulholland Formation is a Pliocene epoch geologic formation in the Berkeley Hills and San Leandro Hills of the East Bay region of the San Francisco Bay Area, California. It is found within Alameda County and Contra Costa County.
The Purisima Formation is a geologic formation in California. It preserves fossils dating from the Late Miocene to Early Pleistocene.
The Kern River Beds Formation is a Neogene Period geologic formation in the southeastern San Joaquin Valley, within Kern County, California.
The Etchegoin Formation is a Pliocene epoch geologic formation in the lower half of the San Joaquin Valley in central California.
The Chanac Formation is a Cenozoic Era sandstone geologic formation in the southeastern San Joaquin Valley, within Kern County, California.
The Tulare Formation is a Pliocene to Holocene epoch geologic formation in the central and southern San Joaquin Valley of central California.
The Santa Clara Formation is a geologic formation in the southeastern Santa Cruz Mountains, in Santa Clara 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 Tejon Formation is a Paleogene period geologic formation in California.
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 Harold Formation is a geologic formation in the Central Mojave Desert, west of Victorville and north of the San Gabriel Mountains, in eastern San Bernardino County, Southern California.
The Tecopa Lake Beds is a Blancan Pleistocene geologic formation in the Mojave Desert in eastern California. It is in the Tecopa area, east of Death Valley, in southeastern Inyo and northeastern San Bernardino 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 Turlock Lake Formation is an Early Pleistocene geologic formation in the Sierra Nevada foothills in Sacramento County, California. Cities in/over the formation's area include Citrus Heights, Carmichael, and Roseville.
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