| Scripps Formation | |
|---|---|
| Stratigraphic range: Eocene | |
| Type | geologic formation |
| Underlies | Friars Formation |
| Overlies | Ardath Shale |
| Thickness | 0–56 m (0–184 ft) |
| Location | |
| Region | San Diego County, California |
| Country |  United States |
| Type section | |
| Named for | Scripps Pier |
The Scripps Formation is a geologic formation in coastal San Diego County, California. [1] [2] [3] It is named for its type section north of the Scripps Pier, on the north side of the Blacks Canyon mouth. [2]
It underlies much of the area from east of Del Mar on the north to the mouth of Mission Valley on the south, and extends north to the Encinitas area. [2] Along the coast, it can be seen from central Torrey Pines State Natural Reserve to Scripps Institution of Oceanography, in La Jolla.
In the north near Encinitas, it correlates with the upper Torrey Sandstone. [2]
It overlies the Ardath Shale, and underlies the Friars Formation. [2]
Sea level rose and fell often during this period of the Eocene Epoch in geologic history. About 42 million years ago, sea level rose again and more sand was deposited. Compressed and cemented, it makes the rock known as the Scripps Formation. This rock holds up the sea bluffs north of Moonlight Beach. Because the mudstone and siltstone of the Ardath Formation are softer and weaker layers, waves erode it and undermine the stronger Scripps Formation sandstone above it, as happens with the Del Mar Formations below Torrey Formations. [1] [3]
Fossils are present but are less common in the Scripps Formation than in the underlying Ardath Shale. [2] Those it preserves date back to the Eocene Epoch of the Paleogene period, during the Cenozoic Era. [4]
The Point Loma Formation is a sedimentary geological formation in Southern California. The strata date back to the Late Cretaceous epochs of the Cretaceous period, during the Mesozoic Era.
The Matilija Sandstone is a sedimentary geologic unit of Eocene epoch in the Paleogene Period, found in Santa Barbara and Ventura Counties in Southern California.
The White River Formation is a geologic formation of the Paleogene Period, in the northern Great Plains and central Rocky Mountains, within the United States.
The Cowlitz Formation is a geologic formation in Washington (state). It preserves fossils dating back to the Paleogene period
The Antelope Shale is a geologic formation in the San Joaquin Valley of central 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 San Pablo Formation is a Late/Upper Miocene epoch geologic formation of the East Bay region in the San Francisco Bay Area, California.
The Friars Formation is a geologic formation in San Diego County, California.
The La Jolla Group is a group of geologic formations in coastal southwestern San Diego County, California.
The Martinez Formation is an Eocene Epoch geologic formation in California.
The Mission Valley Formation is a marine sandstone geologic formation in the Mission Valley region of southwestern San Diego County, 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 Santa Susana Formation is a Paleogene period geologic formation in the Simi Hills and western Santa Susana Mountains of southern California.
The Stadium Conglomerate is a geologic formation in San Diego County, California. It is found at the northern end of Mission Valley near Snapdragon Stadium.
The Sweetwater Formation is a geologic formation in California. It preserves fossils from the Late Eocene period. It underlies the Otay Formation, which reserves fossils of the Oligocene to Miocene periods of the Cenozoic Era.
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 Otay Formation is a geologic formation in San Diego County, California and northern Baja California state (Mexico). It is within the Peninsular Ranges province.
The Delmar Formation is a geologic formation best exposed in seashore cliffs at Del Mar and Solana Beach in California, overlayed by Torrey Sandstone. The formation rocks comprise the barrier bar for Los Peñasquitos Lagoon and have three sub-facies that can be classified as ancient oyster reefs, tidal flats and sublittoral channels and ponds The formation is a result of sedimentary infilling of a large Eocene Delmar lagoon and contains fossils from that period. First identified as "Delmar Sand" by Hanna in 1926. Frederiksen dates the formation as early Lutetian.
The Imperial Formation is the name of two distinct and unrelated geologic formations in North America, of different geologic Eras.
