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The great majority of Yosemite Valley's widening, for example, was due to joint-controlled rockfall. In fact, only 10% of its widening and 12% of its excavation are thought to be the result of glaciation. [3] Large, relatively unjointed volumes of granite form domes such as Half Dome and monoliths like the 3,604 ft (1,098 m) high El Capitan.
Humans may have lived in the Yosemite area as long as 8,000 to 10,000 years ago. [1] Habitation of the Yosemite Valley proper can be traced to about 3,000 years ago, when vegetation and game in the region was similar to that present today; the western slopes of the Sierra Nevada had acorns, deer, and salmon, while the eastern Sierra had pinyon nuts and obsidian. [2]
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 ...
Moderately damaging earthquakes strike between New York and Wilmington, Delaware, about twice a century, the USGS said, and smaller earthquakes are felt in the region roughly every two to three years.
Comprising 1,200 square miles, Yosemite has a lot to offer visitors. “It’s, like, between the natural history, the culture history, the wildlife, the beauty and the size, there’s so much to ...
Original plaque and memorial for the 1872 earthquake More recent memorial of the earthquake, installed March 26, 1988. Researchers later estimated that similar earthquakes occur on the Lone Pine fault every 3,000–4,000 years. However, the Lone Pine fault is only one of many faults on two parallel systems.
California has hundreds of active faults.
The 1980 Mammoth Lakes earthquakes affected Eastern California with the sequence's largest shock occurring on May 25 and measuring M w 6.2. [1] The mainshock and its strong aftershocks located near the Yosemite National Park area were felt in parts of California and Nevada.