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Jumbo Springs Wilderness
Jumbo Springs Wilderness is a 4,631 acre (1,874 ha) wilderness area located in Southern Nevada. Located 50 miles (81 km) east of Las Vegas, the site connects to both the southern and eastern sides of Lake Mead. Jumbo Springs Wilderness was designated as a wilderness area in 2002 and is under the management of the Bureau of Land Management. Geography Despite its small size, Jumbo Springs Wilderness contains a diverse terrain range that is reflected in the geological structures that can be observed, from Precambrian metamorphic rocks to granitic domes and boulders. Animals native to the environment include coyotes, pocket gophers, and white-tailed antelope squirrels. Plants such as Nevada jointfir, cryptobiotic crusts, and buckhorn cholla ''Cylindropuntia acanthocarpa'', commonly referred to as buckhorn cholla, is a cholla native to the Mojave, Sonoran, and Colorado Deserts of North America. Along with ''Cylindropuntia bigelovii'' (the "teddy bear" cholla), it is the most c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clark County, Nevada
Clark County is located in the U.S. state of Nevada. As of the 2020 census, the population was 2,265,461. Most of the county population resides in the Las Vegas Census County Divisions, which hold 1,771,945 people as of the 2010 Census, across . It is by far the most populous county in Nevada, and the 11th most populous county in the United States. It covers 7% of the state's land area but holds 74% of the state's population, making Nevada one of the most centralized states in the United States. History Las Vegas, the state's most populous city, has been the county seat since its establishment. The county was formed by the Nevada Legislature by splitting off a portion of Lincoln County, Nevada, Lincoln County on February 5, 1909, and was organized on July 1, 1909. The Las Vegas Valley (landform), Las Vegas Valley, a basin, includes Las Vegas and other major cities and communities such as North Las Vegas, Henderson, Nevada, Henderson, and the unincorporated community of Parad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boulder
In geology, a boulder (or rarely bowlder) is a rock fragment with size greater than in diameter. Smaller pieces are called cobbles and pebbles. While a boulder may be small enough to move or roll manually, others are extremely massive. In common usage, a boulder is too large for a person to move. Smaller boulders are usually just called rocks or stones. The word ''boulder'' derives from ''boulder stone'', from the Middle English ''bulderston'' or Swedish ''bullersten''. Online Etymology Dictionary. Retrieved December 9, 2011, from Dictionary.com website. In places covered by s during s, s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Wilderness Areas Of The United States
The National Wilderness Preservation System includes 803 wilderness areas protecting of federal land . They are managed by four agencies: *United States National Park Service (NPS) *United States Forest Service (USFS) *United States Fish and Wildlife Service (FWS) *United States Bureau of Land Management (BLM) These wilderness areas cover about 4.5% of the United States' land area, an area larger than the state of California. About 52% of the wilderness area is in Alaska, with of wilderness. They are located in 44 states (excepting Connecticut, Delaware, Iowa, Kansas, Maryland, and Rhode Island) and Puerto Rico. The NPS has oversight of of wilderness at 61 locations. The USFS oversees of wilderness areas in 447 areas. The FWS has responsibility for in 71 areas. BLM oversees at 224 sites. Some wilderness areas are managed by multiple agencies. Some areas are designated wilderness by state or tribal governments. These are not governed by the Federal National Wilderne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cylindropuntia Acanthocarpa
''Cylindropuntia acanthocarpa'', commonly referred to as buckhorn cholla, is a cholla native to the Mojave, Sonoran, and Colorado Deserts of North America. Along with '' Cylindropuntia bigelovii'' (the "teddy bear" cholla), it is the most common cholla found in these deserts. Varieties There are a number of recognized varieties Variety may refer to: Arts and entertainment Entertainment formats * Variety (radio) * Variety show, in theater and television Films * ''Variety'' (1925 film), a German silent film directed by Ewald Andre Dupont * ''Variety'' (1935 film), ... include: *''Cylindropuntia acanthocarpa'' var. ''acanthocarpa'' *''Cylindropuntia acanthocarpa'' var. ''coloradensis'' — L.D. Benson; Colorado buckhorn cholla. *''Cylindropuntia acanthocarpa'' var. ''ganderi'' — (C.B. Wolf) L.D. Benson *''Cylindropuntia acanthocarpa'' var. ''major'' — Engelm. & J.M. Bigelow *''Cylindropuntia acanthocarpa'' var. ''ramosa'' — Peebles *''Cylindropuntia acantho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ephedra Nevadensis
''Ephedra nevadensis'', commonly known as Nevada ephedra, gray ephedra, Mormon tea and Nevada jointfir, is a species of gymnosperm native to dry areas of western North America. Its range extends west to California and Oregon, east to Texas, and south to Baja California, including areas of the Great Basin, Colorado plateau and desert Southwest. It is found in rocky and sandy soils, generally in areas without trees. Reproduction Nevada ephedra is wind-pollinated, with male plants growing in dryer areas and female plants growing in wetter ones, an arrangement which is believed to increase the production of seed. Cones mature and pollination occurs in March to June, with seeds ripening in May to August, although seeds are not produced every year. In the wild, seeds are often spread by rodents, and for cultivation, seeds can readily be collected and sown. The plant can also be propagated via transplants and cuttings. More than other North American ''Ephedra'' species, it is a s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
White-tailed Antelope Squirrel
The white-tailed antelope squirrel (''Ammospermophilus leucurus'') is a diurnal species of ground squirrel, scientifically classified in the order Rodentia and family Sciuridae, found in arid regions of the southwestern United States and the Baja California Peninsula of northwestern Mexico. Distribution The white-tailed antelope squirrel's geographical range extends north to south from southwestern Oregon to New Mexico, and east to west from western Colorado to Baja California, Mexico.Hall, E. R. 1946. Mammals of Nevada. University of California Press, Berkeley, 710 pp. Home range and population density This species of squirrel has an average home range of , and utilizes approximately in its daily activities. Throughout much of the squirrel's range, especially in Utah, the population density fluctuates greatly, with periods of high density followed by periods of low density. Average population density also varies by season, with higher density in autumn relative to late spr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gopher
Pocket gophers, commonly referred to simply as gophers, are burrowing rodents of the family Geomyidae. The roughly 41 speciesSearch results for "Geomyidae" on thASM Mammal Diversity Database are all endemic to North and Central America. They are commonly known for their extensive tunneling activities and their ability to destroy farms and gardens. The name "pocket gopher" on its own may refer to any of a number of genera within the family Geomyidae. These are the "true" gophers, but several ground squirrels in the distantly related family Sciuridae are often called "gophers", as well. The origin of the word "gopher" is uncertain; the French ''gaufre'', meaning waffle, has been suggested, on account of the gopher tunnels resembling the honeycomb-like pattern of holes in a waffle; another suggestion is that the word is of Muskogean origin. Description Gophers weigh around , and are about in body length, with a tail long. A few species reach weights approaching . Within any sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coyote
The coyote (''Canis latrans'') is a species of canis, canine native to North America. It is smaller than its close relative, the wolf, and slightly smaller than the closely related eastern wolf and red wolf. It fills much of the same ecological niche as the golden jackal does in Eurasia. The coyote is larger and more predatory and was once referred to as the American jackal by a behavioral ecologist. Other historical names for the species include the prairie wolf and the brush wolf. The coyote is listed as Least Concern, least concern by the International Union for Conservation of Nature, due to its wide distribution and abundance throughout North America. The species is versatile, able to adapt to and expand into environments modified by humans. It is enlarging its range by moving into urban areas in the eastern U.S. and Canada. The coyote was sighted in eastern Panama (across the Panama Canal from their home range) for the first time in 2013. The coyote has 19 recognized sub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Granite Dome
Granite domes are domical hills composed of granite with bare rock exposed over most of the surface. Generally, domical features such as these are known as bornhardts. Bornhardts can form in any type of plutonic rock but are typically composed of granite and granitic gneiss. As granitic plutons cool kilometers below the Earth's surface, minerals in the rock crystallize under uniform confining pressure. Erosion brings the rock closer to Earth's surface and the pressure from above the rock decreases; as a result the rock fractures. These fractures are known as exfoliation joints, or sheet fractures, and form in onionlike patterns that are parallel to the land surface. These sheets of rock peel off the exposed surface and in certain conditions develop domical structures. Additional theories on the origin of granite domes involve scarp-retreat and tectonic uplift. Sheet fractures Sheet fractures are arcuate fractures defining slabs of rock that range from 0.5 to 10 meters thic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States
The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territories, nine Minor Outlying Islands, and 326 Indian reservations. The United States is also in free association with three Pacific Island sovereign states: the Federated States of Micronesia, the Marshall Islands, and the Republic of Palau. It is the world's third-largest country by both land and total area. It shares land borders with Canada to its north and with Mexico to its south and has maritime borders with the Bahamas, Cuba, Russia, and other nations. With a population of over 333 million, it is the most populous country in the Americas and the third most populous in the world. The national capital of the United States is Washington, D.C. and its most populous city and principal financial center is New York City. Paleo-Americ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metamorphic Rock
Metamorphic rocks arise from the transformation of existing rock to new types of rock in a process called metamorphism. The original rock (protolith) is subjected to temperatures greater than and, often, elevated pressure of or more, causing profound physical or chemical changes. During this process, the rock remains mostly in the solid state, but gradually recrystallizes to a new texture or mineral composition. The protolith may be an igneous, sedimentary, or existing metamorphic rock. Metamorphic rocks make up a large part of the Earth's crust and form 12% of the Earth's land surface. They are classified by their protolith, their chemical and mineral makeup, and their texture. They may be formed simply by being deeply buried beneath the Earth's surface, where they are subject to high temperatures and the great pressure of the rock layers above. They can also form from tectonic processes such as continental collisions, which cause horizontal pressure, friction, and distorti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Precambrian
The Precambrian (or Pre-Cambrian, sometimes abbreviated pꞒ, or Cryptozoic) is the earliest part of Earth's history, set before the current Phanerozoic Eon. The Precambrian is so named because it preceded the Cambrian, the first period of the Phanerozoic Eon, which is named after Cambria, the Latinised name for Wales, where rocks from this age were first studied. The Precambrian accounts for 88% of the Earth's geologic time. The Precambrian is an informal unit of geologic time, subdivided into three eons ( Hadean, Archean, Proterozoic) of the geologic time scale. It spans from the formation of Earth about 4.6 billion years ago ( Ga) to the beginning of the Cambrian Period, about million years ago ( Ma), when hard-shelled creatures first appeared in abundance. Overview Relatively little is known about the Precambrian, despite it making up roughly seven-eighths of the Earth's history, and what is known has largely been discovered from the 1960s onwards. The Precambrian fossil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
