| Mount Eden Formation of Fraser (1931) | |
|---|---|
| Stratigraphic range: Neogene | |
| Type | Formation |
| Location | |
| Coordinates | 33°52′04″N117°02′27″W / 33.867785°N 117.0408293°W |
| Region | California |
| Country | United States |
The Mt. Eden Formation is a geologic formation in Riverside County, California. [1] It underlies the San Timoteo Formation, and preserves fossils dating back to the Neogene period. [2]
This geologic formation was initially described in 1921 by paleontologist Childs Frick, [3] who considered the San Timoteo Badlands to be split into three lithologic parts: (1) the Potrero Creek deposits, (2) the San Timoteo Formation, and (3) the Eden beds. [4] The word "Eden" was taken from a large hill of schist located just west of the San Jacinto quadrangle. [5] By 1931, the term "Mt. Eden formation" became prevalent while the term "Eden beds" fell into disuse, and the Potrero Creek deposits ceased to be considered a separate entity. [4]
The Morrison Formation is a distinctive sequence of Upper Jurassic sedimentary rock found in the western United States which has been the most fertile source of dinosaur fossils in North America. It is composed of mudstone, sandstone, siltstone, and limestone and is light gray, greenish gray, or red. Most of the fossils occur in the green siltstone beds and lower sandstones, relics of the rivers and floodplains of the Jurassic period.
The Badlands are a mountain range in Riverside County, California. They are also known as the San Timoteo Badlands. The range trend northwest–southeast with the San Jacinto Valley to the southwest, the San Timoteo Canyon to the northeast and the San Jacinto Mountains to the east. These mountains separate the cities of Beaumont and Moreno Valley. The mountains are crossed by California State Route 60, California State Route 79, and a handful of smaller roads.
San Timoteo Creek is a stream in Riverside and San Bernardino counties in southern California, United States. A tributary of the Santa Ana River, it flows through San Timoteo Canyon. San Timoteo Creek has a drainage basin of about 125 square miles (320 km2). The creek receives most of its water from headwater tributaries flowing from the San Bernardino Mountains near Cherry Valley, as well as Yucaipa Creek, which flows from Live Oak Canyon.
The Matawan Formation is a geologic formation in Maryland and New Jersey. It preserves fossils dating back to the Cretaceous period.
The Muddy Creek Formation is a geologic formation in Arizona, California, Nevada, and Utah. It preserves fossils dating back to the Neogene period.
The Renton Formation is a geologic formation in Washington (state) within the Puget Group. It preserves fossils dating back to the Paleogene period.
The Chatsworth Formation is a Cretaceous period sandstone geologic formation in the Simi Hills and western Santa Susana Mountains of southern California.
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 Briones Formation is a Late/Upper Miocene epoch geologic formation of the East Bay region in the San Francisco Bay Area, California.
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 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 Susana Formation is a Paleogene period geologic formation in the Simi Hills and western Santa Susana Mountains 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.
The San Timoteo Formation is a geologic formation in California. It preserves fossils.
The Monach Formation is a geologic formation of Early Cretaceous (Valanginian) age in the Western Canada Sedimentary Basin that consists primarily of sandstone. It is present in the northern foothills of the Canadian Rockies and the adjacent plains in northeastern British Columbia.
The Hulcross Formation is a geologic formation in the Western Canada Sedimentary Basin in northeastern British Columbia that was deposited in marine environments during the late Albian stage of the Early Cretaceous period. At one time considered to be a member of the Commotion Formation, it was elevated to formation status by D.F. Stott in 1982. It preserves ammonites and other fossils.
The Vasquez Formation (Tvz) is a geologic formation cropping out at the eponymous Vasquez Rocks in southern California. The formation dates to the Late Oligocene to Early Miocene.
