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The La Jolla Group is a group of geologic formations in coastal southwestern San Diego County, California. The group preserves fossils dating back to the Cretaceous period. [1] Most of the La Jolla Group stratigraphy was deposited during the Eocene when sea level was higher than its present-day elevation.
The Point Loma Formation was first described as the middle formation of the Rosario Group by Kennedy and Moore in 1971. Their description is that the lower half is composed of interbedded fine-grained, dusky yellow sandstone and olive-gray clay shale in ledgy graded beds about 20 cm thick, which grades into massive grayish-black siltstone in the top half of the formation.
The Friars Formation is a geologic formation in San Diego County, California. [1] [2] Geology. It is the uppermost unit of the La Jolla Group.
The San Diego Formation Basin is a confined shallow aquifer. It has a basin ground surface area of 79,724 acres (32,263 ha) and an estimated groundwater storage capacity of 960,000 acre-feet. The depth to groundwater is about 100 feet (30 m). [ 3 ]
Slab City is located on roughly 640 acres (260 hectares) of public land, [9] near the east shore of the Salton Sea.It is 100 miles (160 kilometers) northeast of San Diego, 169 mi (272 km) southeast of Los Angeles and about 50 mi (80 km) from Mexico. [10]
The oldest rocks in California date back 1.8 billion years to the Proterozoic and are found in the San Gabriel Mountains, San Bernardino Mountains, and Mojave Desert.The rocks of eastern California formed a shallow continental shelf, with massive deposition of limestone during the Paleozoic, and sediments from this time are common in the Sierra Nevada, Klamath Mountains and eastern Transverse ...