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Little Walker Caldera
Little Walker Caldera is a depression in the eastern Sierra Nevada in California that is adjacent to the Sweetwater Mountains. The caldera is very large, measuring about in diameter. The caldera is named for the Little Walker River. U.S. Route 395 in California crosses the Northern boundary of the caldera, just west of the Devil's Gate Pass. California State Route 108 follows more of the northern boundary of the caldera. Little Walker Caldera last produced a major eruption about 9 million years ago. Andesitic lava and tuff from the series of three eruptive events are found several hundred feet thick as far away as Antelope Valley, Mono County, north, Bridgeport Valley to the south, and Sonora to the wes The lava flows near Sonora are readily visible from California State Route 108 State Route 108 (SR 108) is a state highway in the U.S. state of California that runs from the Central Valley and across the Sierra Nevada via the Sonora Pass. It generally runs northeast from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sierra Nevada (U
The Sierra Nevada () is a mountain range in the Western United States, between the Central Valley of California and the Great Basin. The vast majority of the range lies in the state of California, although the Carson Range spur lies primarily in Nevada. The Sierra Nevada is part of the American Cordillera, an almost continuous chain of mountain ranges that forms the western "backbone" of the Americas. The Sierra runs north-south and its width ranges from to across east–west. Notable features include General Sherman, the largest tree in the world by volume; Lake Tahoe, the largest alpine lake in North America; Mount Whitney at , the highest point in the contiguous United States; and Yosemite Valley sculpted by glaciers from one-hundred-million-year-old granite, containing high waterfalls. The Sierra is home to three national parks, twenty wilderness areas, and two national monuments. These areas include Yosemite, Sequoia, and Kings Canyon National Parks; and Devils ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
California
California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territories of the United States by population, most populous U.S. state and the List of U.S. states and territories by area, 3rd largest by area. It is also the most populated Administrative division, subnational entity in North America and the 34th most populous in the world. The Greater Los Angeles area and the San Francisco Bay Area are the nation's second and fifth most populous Statistical area (United States), urban regions respectively, with the former having more than 18.7million residents and the latter having over 9.6million. Sacramento, California, Sacramento is the state's capital, while Los Angeles is the List of largest California cities by population, most populous city in the state and the List of United States cities by population, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sweetwater Mountains
The Sweetwater Mountains (highest peak: Mount Patterson ) are a small mountain range in northern Mono County, California and western Lyon County, Nevada, separating the West Walker River from the East Walker River. Most of the range is only accessible by four wheel drive vehicle, on foot, or pack animal. Most of the range is contained in the Toiyabe National Forest. The place name appears on the 1874 California Geologic Survey map of California and Nevada. The ghost towns of Belfort and Clinton are small gold mining camps on the southeastern slope of Mt. Patterson. The Sweetwater post office existed on the eastern boundary of the range in the 1920s. The Fales post office existed on the southwestern boundary in 1877. Both Clinton and Belfort had post offices in the 1880s. There are several other inactive small gold mining camps and gold mines in the range, including Boulder Flat, Montague Mine, Angelo Mission Mine, Kentuck Mine, Frederick Mine, Longstreet Mine, Lilly Mine, D ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Little Walker River
The Little Walker River is a tributary of the West Walker River, approximately 15 mi (24 km) long, in eastern California in the United States. It drains part of the Sierra Nevada mountains in the watershed of Walker Lake. It rises from snowmelt in northwestern Mono County, north of Yosemite National Park in the Toiyabe National Forest. It flows north, joining the West Walker River from the south approximately 10 mi (16 km) south of Walker. See also *List of rivers in the Great Basin The list of rivers of the Great Basin identifies waterways named as rivers, regardless of the amount of their flow. __TOC__ Significant rivers The Great Basin is a series of contiguous watersheds, bounded on the west by watersheds of the ... References Rivers of Mono County, California Rivers of Northern California Rivers of the Great Basin {{California-river-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Devil's Gate Pass
Devil's Gate Pass is a mountain pass in Mono County, California, traversed by U.S. Route 395. The pass is named for the Devils Gate, a granitic formation located west of the summit of the pass. Location Bridgeport and the East Walker River lie to the east and south of Devil's Gate, and the West Walker River lies to the west and north. The Sierra Nevada rise up from the west and south of the pass, while to the northeast the Sweetwater Mountains spur off from the Sierra Nevada. The Little Walker Caldera lies southwest of the pass. Devil's Gate Pass is a few miles east of Sonora Junction, which is the junction of U.S. 395 with State Route 108. This segment of U.S. 395 connects Antelope Walker valley to Big Meadows (Bridgeport). State Route 108 terminates at Sonora Junction with the west bound road connecting to Sonora Pass and Sonora over the Sierra Nevada. The given coordinates are the location of the highest point of U.S. Route 395 through the pass (what Caltrans calls t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
California State Route 108
State Route 108 (SR 108) is a state highway in the U.S. state of California that runs from the Central Valley and across the Sierra Nevada via the Sonora Pass. It generally runs northeast from downtown Modesto near the SR 99/ SR 132 interchange, to U.S. Route 395 near the Nevada state line. The route was once recommended to continue south of Modesto to Interstate 5, although today that portion exists as a county road. Parts of SR 108 are closed annually during the winter due to inclement weather along the summit. Route description State Route 108 begins in downtown Modesto at the junction of SR 99 and SR 132, overlapping SR 132 for several blocks northeast on L Street to 9th Street. There it splits into a short one-way pair, with eastbound SR 108 turning southeast with SR 132 on 9th Street to K Street and then northeast to Needham Street; the westbound direction remains on L Street to Needham Street. After several blocks eastward on Needham Street, SR 108 reaches McHenry Avenue ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sonora, California
Sonora is the county seat of Tuolumne County, California. Founded during the California Gold Rush by Mexican miners from Sonora (after which the city is named), the city population was 5,226 during the 2020 Census, an increase of 221 from the 4,903 counted during the 2010 Census. Sonora is the only incorporated community in Tuolumne County. History Sonora was founded by Mexican miners during the California Gold Rush. Named after their home state of Sonora, Mexico, it was once a booming center of industry and trade in California's Mother Lode. Most of the gold that was removable with traditional mining techniques was quickly extracted, leaving miners to use more complex and expensive mining techniques to reach deep pockets of quartz and gold. Sonora as well as other mining towns of the era experienced economic hardship when the value of gold decreased. As "gold fever" died down, Sonora's size and population steadily decreased over the years. In c. 1851, the Sonora Hebrew ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yosemite National Park
Yosemite National Park ( ) is an American national park in California, surrounded on the southeast by Sierra National Forest and on the northwest by Stanislaus National Forest. The park is managed by the National Park Service and covers an area of and sits in four County, countiescentered in Tuolumne County, California, Tuolumne and Mariposa County, California, Mariposa, extending north and east to Mono County, California, Mono and south to Madera County, California, Madera County. Designated a World Heritage Site in 1984, Yosemite is internationally recognized for its granite cliffs, waterfalls, clear streams, Sequoiadendron giganteum, giant sequoia groves, lakes, mountains, meadows, glaciers, and Biodiversity, biological diversity. Almost 95 percent of the park is designated National Wilderness Preservation System, wilderness. Yosemite is one of the largest and least fragmented habitat blocks in the Sierra Nevada, and the park supports a diversity of plants and animals. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcanoes Of Mono County, California
A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where tectonic plates are diverging or converging, and most are found underwater. For example, a mid-ocean ridge, such as the Mid-Atlantic Ridge, has volcanoes caused by divergent tectonic plates whereas the Pacific Ring of Fire has volcanoes caused by convergent tectonic plates. Volcanoes can also form where there is stretching and thinning of the crust's plates, such as in the East African Rift and the Wells Gray-Clearwater volcanic field and Rio Grande rift in North America. Volcanism away from plate boundaries has been postulated to arise from upwelling diapirs from the core–mantle boundary, deep in the Earth. This results in hotspot volcanism, of which the Hawaiian hotspot is an example. Volcanoes are usually not created where two tectonic plates slide pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcanism Of California
Volcanism, vulcanism or volcanicity is the phenomenon of eruption of molten rock (magma) onto the surface of the Earth or a solid-surface planet or moon, where lava, pyroclastics, and volcanic gases erupt through a break in the surface called a vent. It includes all phenomena resulting from and causing magma within the crust or mantle of the body, to rise through the crust and form volcanic rocks on the surface. Magmas, that reach the surface and solidify, form extrusive landforms. Volcanic processes Magma from the mantle or lower crust rises through the crust towards the surface. If magma reaches the surface, its behavior depends on the viscosity of the molten constituent rock. Viscous (thick) magma produces volcanoes characterised by explosive eruptions, while non-viscous (runny) magma produce volcanoes characterised by effusive eruptions pouring large amounts of lava onto the surface. In some cases, rising magma can cool and solidify without reaching the surface. Inste ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calderas Of California
A caldera ( ) is a large cauldron-like hollow that forms shortly after the emptying of a magma chamber in a volcano eruption. When large volumes of magma are erupted over a short time, structural support for the rock above the magma chamber is gone. The ground surface then collapses into the emptied or partially emptied magma chamber, leaving a large depression at the surface (from one to dozens of kilometers in diameter). Although sometimes described as a Volcanic crater, crater, the feature is actually a type of sinkhole, as it is formed through subsidence and collapse rather than an explosion or impact. Compared to the thousands of volcanic eruptions that occur each century, the formation of a caldera is a rare event, occurring only a few times per century. Only seven caldera-forming collapses are known to have occurred between 1911 and 2016. More recently, a caldera collapse occurred at Kīlauea, Hawaii in 2018. Etymology The term ''caldera'' comes from Spanish language, S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcanoes Of California
A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where tectonic plates are diverging or converging, and most are found underwater. For example, a mid-ocean ridge, such as the Mid-Atlantic Ridge, has volcanoes caused by divergent tectonic plates whereas the Pacific Ring of Fire has volcanoes caused by convergent tectonic plates. Volcanoes can also form where there is stretching and thinning of the crust's plates, such as in the East African Rift and the Wells Gray-Clearwater volcanic field and Rio Grande rift in North America. Volcanism away from plate boundaries has been postulated to arise from upwelling diapirs from the core–mantle boundary, deep in the Earth. This results in hotspot volcanism, of which the Hawaiian hotspot is an example. Volcanoes are usually not created where two tectonic plates slide p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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