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The Cabrillo Formation is a Maastrichtian stage geologic formation in coastal San Diego County, southern California. It is part of the Rosario Group . [ 2 ] The Maastrichtian stage is of the Late Cretaceous Epoch , during the Mesozoic Era .
The probability of a serious earthquake on various faults has been estimated in the 2008 Uniform California Earthquake Rupture Forecast. According to the United States Geological Survey, Southern California experiences nearly 10,000 earthquakes every year. [3] Details on specific faults can be found in the USGS Quaternary Fault and Fold Database.
The proto-Kern Canyon Zone is an old ductile shear zone found at the northern segment of the fault line. [1] Evidence of mylonitized zones, 90 Ma intrusive rocks, and Mesozoic-metamorphic rocks mention that this was where the Kern Canyon Fault (which shares these same rock specimens) first emerged and had drifted away from due to the constant activity within the batholith.
[6] [4] The northern part of the fault zone is complex, as it is the meeting point between two fault zones: the San Pedro Basin Fault Zone and the Santa Catalina Fault Zone. [7] They bound the Santa Catalina island platform with the Santa Catalina Fault Zone running to the west, and the San Pedro Basin Fault Zone to the east. [7]
The Newport–Inglewood-Rose Canyon Fault Zone. The Newport–Inglewood Fault is a right-lateral strike-slip fault [1] in Southern California.The fault extends for 47 mi (76 km) [1] (110 miles if the Rose Canyon segment is included) from Culver City southeast through Inglewood and other coastal communities to Newport Beach at which point the fault extends east-southeast into the Pacific Ocean.
A multi-year study published in 2018 suggests a connection between the Elsinore fault and other fault lines farther south, in Mexico: "...observations of the Yuha Desert and Salton Trough suggest that the 2010 M7.2 El Mayor ‐ Cucapah earthquake rupture, the Laguna Salada fault in Baja California, Mexico, and the Elsinore fault in California ...
Superbloom in the Temblor Range, April 2017. The Carrizo Plain (Obispeño: tšɨłkukunɨtš, "Place of the rabbits") [5] is a large enclosed grassland plain, approximately 50 miles (80 km) long and up to 15 miles (24 km) across, in southeastern San Luis Obispo County, California, United States, about 100 miles (160 km) northwest of Los Angeles. [6]
The Verdugo Mountains consist of an east-west-trending antiformal fault block, bounded on the south by the Verdugo Fault, a north-dipping reverse fault, and on the north by the Sierra Madre thrust fault near the front of the San Gabriel Mountains, [4] thus including the sediment-covered Crescenta Valley within the Verdugo Mountains Block.