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Black Mountains (Arizona)
The Black Mountains of northwest Arizona are an extensive, mostly linear, north-south trending long mountain range. It forms the north-south border of southwest Mohave County as it borders the eastern shore of the south-flowing Colorado River from Hoover Dam. The northwest and part of the western areas of the range are located within the Lake Mead National Recreation Area. Three wilderness areas are within the range. The historic mining site of Oatman, 4 miles north of Boundary Cone, is nestled in the southern portion of the range between the Mount Nutt and Warm Springs wildernesses. Description The mountain range is generally 10-15 mi wide, narrower in the north, and west of the Detrital Valley northeast. The southern end of the range with the two wilderness areas is a larger block and the Warm Springs Wilderness is made of a mountain section called Black Mesa, separated from the north section by Sitgreaves Pass, on the route to Oatman, Arizona. The high point ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Needles, California
Needles is a city in San Bernardino County, California, in the Mojave Desert region of Southern California. Situated on the western banks of the Colorado River, Needles is located near the Californian border with Arizona and Nevada. The city is accessible via Interstate 40 and U.S. Route 95. The population was 4,959 at the 2020 census, up from 4,844 at the 2010 census. History Needles was founded in May 1883 during the construction of the Atchison, Topeka and Santa Fe Railway, which originally crossed the Colorado River at Eastbridge, Arizona three miles southeast of modern Needles. Needles was named after "The Needles", a group of pinnacles in the Mohave Mountains on the Arizona side of the river. However, the crossing was a poor site for a bridge, lacking firm banks and a solid bottom. A bridge was actually built, but it was of poor quality. Not only was it a "flimsy looking structure", but it was also an obstacle to navigation on the river. The flooding of the Colorado R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Perkins (Arizona)
Mount Perkins () is a mountain at the east end of the Fosdick Mountains in the Ford Ranges, Marie Byrd Land Marie Byrd Land (MBL) is an unclaimed region of Antarctica. With an area of , it is the largest unclaimed territory on Earth. It was named after the wife of American naval officer Richard E. Byrd, who explored the region in the early 20th centur .... It was discovered by the Byrd Antarctic Expedition on the Northeastern Flight of December 15–16, 1934, and named for Jack E. Perkins, who was a biologist at the United States Antarctic Service (USAS) West Base (1939–41) and the leader of a biological party which visited this area in December 1940. References Mountains of Marie Byrd Land {{MarieByrdLand-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mountain Ranges Of The Lower Colorado River Valley
A mountain is an elevated portion of the Earth's crust, generally with steep sides that show significant exposed bedrock. Although definitions vary, a mountain may differ from a plateau in having a limited summit area, and is usually higher than a hill, typically rising at least 300 metres (1,000 feet) above the surrounding land. A few mountains are isolated summits, but most occur in mountain ranges. Mountains are formed through Tectonic plate, tectonic forces, erosion, or volcanism, which act on time scales of up to tens of millions of years. Once mountain building ceases, mountains are slowly leveled through the action of weathering, through Slump (geology), slumping and other forms of mass wasting, as well as through erosion by rivers and glaciers. High elevations on mountains produce Alpine climate, colder climates than at sea level at similar latitude. These colder climates strongly affect the Montane ecosystems, ecosystems of mountains: different elevations have diffe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fortification Hill
Fortification Hill is a prominence adjacent to Lake Mead in the Lake Mead National Recreation Area; it is located at the northwest terminus region of the Black Mountains (Arizona), and specifically the ''north region'' of the Black Mountains. It is near a southern section of Lake Mead, and just northeast of Hoover Dam. It can easily be seen eastward across Las Vegas Bay or from the two northern mountain terminuses of Eldorado Mountains (Nevada), or the Black Mountains (Arizona). The mountain prominence is plateau-like, or mesa-like with its highpoint at the southeast terminus, and sloping north and northwestwards toward Lake Mead. The prominence is . The flat mountaintop, sloping northwards is composed of Tertiary ''basaltic lava flows''.''Geologic Highway Map of Arizona'', from Geology: ''Arizona Geological Survey Map 26, 1988. See also * Black Mountains (Arizona) * Eldorado Mountains The Eldorado Mountains, also called the El Dorado Mountains, are a north-south trending m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Topock Marsh
Havasu National Wildlife Refuge is a U.S. National Wildlife Refuge on the lower Colorado River in Arizona and California. It preserves habitat for desert bighorn sheep, the endangered southwestern willow flycatcher, and other animals. The refuge protects 30 river miles - of shoreline - from Needles, California, to Lake Havasu City, Arizona. One of the last remaining natural stretches of the lower Colorado River flows through the Topock Gorge. Species Animal species that inhabit this refuge include peregrine falcon, coyote, fox, desert bighorn sheep, greater roadrunner, bobcat, and cougar. Thousands of bats emerge from historic mines and razorback suckers swim in the back of Beal Lake. Support A large river in a dry, hot land attracts wildlife and people like a powerful magnet. Many thousands of visitors annually flock to the refuge to boat through the Topock Gorge, watch waterbirds in Topock Marsh, or hike to the Havasu Wilderness Area. A non-profit membership organization ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Divide
A drainage divide, water divide, ridgeline, watershed, water parting or height of land is elevated terrain that separates neighboring drainage basins. On rugged land, the divide lies along topographical ridges, and may be in the form of a single range of hills or mountains, known as a dividing range. On flat terrain, especially where the ground is marshy, the divide may be difficult to discern. A triple divide is a point, often a summit, where three drainage basins meet. A ''valley floor divide'' is a low drainage divide that runs across a valley, sometimes created by deposition or stream capture. Major divides separating rivers that drain to different seas or oceans are continental divides. The term ''height of land'' is used in Canada and the United States to refer to a drainage divide. It is frequently used in border descriptions, which are set according to the "doctrine of natural boundaries". In glaciated areas it often refers to a low point on a divide where it is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Warm Springs Wilderness
The Warm Springs Wilderness makes up the entirety of the Black Mesa (western Arizona) and parts of the surrounding foothills, washes, alluvial fans, and valleys. The Black Mesa is the southernmost section of the Black Mountains of western Mohave County, in northwest Arizona Arizona ( ; nv, Hoozdo Hahoodzo ; ood, Alĭ ṣonak ) is a U.S. state, state in the Southwestern United States. It is the list of U.S. states and territories by area, 6th largest and the list of U.S. states and territories by population, 14 .... The region is in the east and southeast of the Mojave Desert of Arizona, southern Nevada, and California. The wilderness is southwest of Kingman, Arizona and east of Mohave Valley, Arizona and Needles, California. Oatman, Arizona, Oatman, AZ lies on its northwest perimeter, adjacent to the Boundary Cone landmark; Yucca, Arizona, Yucca, AZ is on its east in the south-central Sacramento Valley (Arizona), Sacramento Valley on Interstate 40 in Arizona which trav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Nutt Wilderness
Mount Nutt Wilderness is a protected wilderness area in the central part of the Black Mountains in the U.S. state of Arizona. It was established in 1990 under the Arizona Desert Wilderness Act, and it is managed by the Bureau of Land Management The Bureau of Land Management (BLM) is an agency within the United States Department of the Interior responsible for administering federal lands. Headquartered in Washington DC, and with oversight over , it governs one eighth of the country's la .... This desert wilderness sits among a maze of desert canyons and steep mesas, surrounded by volcanic plugs. Mount Nutt, the namesake for the wilderness, rises to an elevation of 5,216 feet (1589 m). Vegetation in the area includes cottonwoods, willows, and oak, sustained by several springs, that also support a small population of desert bighorn sheep. See also * List of Arizona Wilderness Areas * List of U.S. Wilderness Areas References {{Authority control IUCN Category Ib ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wilderness Area
Wilderness or wildlands (usually in the plural), are natural environments on Earth that have not been significantly modified by human activity or any nonurbanized land not under extensive agricultural cultivation. The term has traditionally referred to terrestrial environments, though growing attention is being placed on marine wilderness. Recent maps of wilderness suggest it covers roughly one quarter of Earth's terrestrial surface, but is being rapidly degraded by human activity. Even less wilderness remains in the ocean, with only 13.2% free from intense human activity. Some governments establish protection for wilderness areas by law to not only preserve what already exists, but also to promote and advance a natural expression and development. These can be set up in preserves, conservation preserves, national forests, national parks and even in urban areas along rivers, gulches or otherwise undeveloped areas. Often these areas are considered important for the survival of c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Mead National Recreation Area
Lake Mead National Recreation Area is a U.S. national recreation area in southeastern Nevada and northwestern Arizona. Operated by the National Park Service, Lake Mead NRA follows the Colorado River corridor from the westernmost boundary of Grand Canyon National Park to just north of the cities of Laughlin, Nevada and Bullhead City, Arizona. It includes all of the eponymous Lake Mead as well as the smaller Lake Mohave – reservoirs on the river created by Hoover Dam and Davis Dam, respectively – and the surrounding desert terrain and wilderness. Formation of Lake Mead began in 1935, less than a year before Hoover Dam was completed. The area surrounding Lake Mead was protected a bird refuge in 1933, later established as the Boulder Dam Recreation Area in 1936 and the name was changed to Lake Mead National Recreation Area in 1947. In 1964, the area was expanded to include Lake Mohave and its surrounding area and became the first National Recreation Area to be designated as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hoover Dam
Hoover Dam is a concrete arch-gravity dam in the Black Canyon of the Colorado River, on the border between the U.S. states of Nevada and Arizona. It was constructed between 1931 and 1936 during the Great Depression and was dedicated on September 30, 1935, by President Franklin D. Roosevelt. Its construction was the result of a massive effort involving thousands of workers, and cost over one hundred lives. It was referred to as Hoover Dam after President Herbert Hoover in bills passed by Congress during its construction; it was named Boulder Dam by the Roosevelt administration. The Hoover Dam name was restored by Congress in 1947. Since about 1900, the Black Canyon and nearby Boulder Canyon had been investigated for their potential to support a dam that would control floods, provide irrigation water and produce hydroelectric power. In 1928, Congress authorized the project. The winning bid to build the dam was submitted by a consortium named Six Companies, Inc., which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
