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Altar Valley
The Altar Valley is a 45-mile (72 km) long north–south valley, trending slightly northeast from Sasabe, Arizona on the Mexico border to the Avra Valley west of the Tucson Mountains. It is delimited by Arizona State Route 86, from east-to-west on the north separating it from the Avra Valley which then trends ''northwesterly'', merging into the plains and drainage of the Santa Cruz River. The valley is traversed from north to south by Arizona Route 286. The major Baboquivari sky island range borders the valley on the west; the east is bordered by a series of mountain ranges, that have Nogales, Arizona nestled in between at the United States-Mexico border. Two wilderness areas lie to the west of the valley, the Coyote Mountains Wilderness east of Kitt Peak Observatory, and the Baboquivari Peak Wilderness. The center of the valley is near Baldy Peak in the southwest Sierrita Mountains. Baldy Peak's height is .Arizona Road & Recreation Atlas, pp. 86–87. Madrean Sky I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quinlan Mountains
The Quinlan Mountains is a mountain range in the U.S. state of Arizona. Its highest point is Kitt Peak at , which is also the second-highest peak on the Tohono O'odham Indian Reservation, after Baboquivari Peak. The range lies on the eastern end of the reservation about southwest of Tucson. The Quinlan Mountains are north of the Baboquivari Mountains, the two ranges separated by the pass at the head of the Pavo Kug Wash. The Quinlan range also sits southwest of the Coyote Mountains, separated from them by the Pan Tak Pass. When George J. Roskruge created the official map of Pima County in 1893, he named the range after James Quinlin, who had opened a stagecoach station in the nearby town of Quinlin in 1884. Although the range had also been known as the Quinlin or Quinuin mountains at different points in history, Quinlan became the official name as a result of a decision by the Board on Geographic Names The United States Board on Geographic Names (BGN) is a federal body oper ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arizona
Arizona ( ; nv, Hoozdo Hahoodzo ; ood, Alĭ ṣonak ) is a state in the Southwestern United States. It is the 6th largest and the 14th most populous of the 50 states. Its capital and largest city is Phoenix. Arizona is part of the Four Corners region with Utah to the north, Colorado to the northeast, and New Mexico to the east; its other neighboring states are Nevada to the northwest, California to the west and the Mexican states of Sonora and Baja California to the south and southwest. Arizona is the 48th state and last of the contiguous states to be admitted to the Union, achieving statehood on February 14, 1912. Historically part of the territory of in New Spain, it became part of independent Mexico in 1821. After being defeated in the Mexican–American War, Mexico ceded much of this territory to the United States in 1848. The southernmost portion of the state was acquired in 1853 through the Gadsden Purchase. Southern Arizona is known for its desert cl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cerro Colorado Mountains
The Cerro Colorado Mountains are a low mountain range in southern Pima County, Arizona, USA. The highest point of the range is Colorado Peak (). The range consists of a NNW–SSE trending ridge with several shorter ridges extending off the main ridge to the ENE. The higher portions of the range cover an area of about , with dimensions of by .''Cerro Colorado, Ariz.,'' 7.5 minute quadrangle, USGS, 1979 The foothills of the Sierrita Mountains lie about to the north with the Batamote Hills and Penitas Hills between to the north and northwest respectively. The Las Guijas Mountains lie to the southwest. The Sierra Colorado silver mining district lies in the hills between the Sierra Colorados and the Las Guijas ranges. Saucito Mountain at the north end of the Tumacacori Mountains of Santa Cruz County is about southeast. Arivaca Junction in the Santa Cruz River valley lies due east. The Santa Rita Mountains are across the Santa Cruz Valley to the east. The broad Altar Valley l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Buenos Aires National Wildlife Refuge
Buenos Aires National Wildlife Refuge (Buenos Aires NWR) provides of habitat for threatened and endangered plants and animals. This refuge, in Pima County, Arizona, was established in 1985. Natural history The semidesert grassland supports the reintroduction of Northern Bobwhite#Masked quail, Masked quail and pronghorns. Prescribed and natural fires play a major role in maintaining and restoring the sea of grass that once filled the Altar Valley. Riparian (wetland) areas along Arivaca Cienega and Arivaca Creek attract an abundance of birds. Brown Canyon, to the west of the Arivaca Creek area, is nestled in the Baboquivari Peak Wilderness, Baboquivari Mountains, where a Arizona Sycamore, sycamore-lined stream meanders through oak woodland. Fauna The refuge is home to 58 mammal species. Among the larger species are mule deer, white-tailed deer, pronghorn, javelina and Cougar, puma. There are also more than 325 different bird species and 53 species of reptiles and amphibians. Reintr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mohawk Mountains
The Mohawk Mountains ( mrc, Vii Kachkwiny, ood, Kusvo To:b) is a mountain range in the northwest Sonoran Desert of southwest Arizona. It abuts the western Gila River valley to the north (the Lower Gila River Valley), and is located in southern Yuma County. The Mohawk Valley lies adjacent and southwest of the range; the San Cristobal Valley is northeast.''Arizona Atlas & Gazetteer,'' DeLorme, 4th ed., 2001, p. 63, The Mohawk Mountains-Bryan Mountains is a northwest–southeast trending block faulted system. Mohawk, Arizona on Interstate 8 is located on the north end of the range; Mohawk Pass traverses the range with the interstate route. The highest point in the Mohawk Range is Mohawk Peak at . See also * Valley and range sequence-Southern Yuma County * List of mountain ranges of Yuma County, Arizona A list of mountain ranges of Yuma County, Arizona. '' Yuma, Arizona Winterhaven, California'' is on the Colorado River in the southern section of the Lower Colorado River Va ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcanic
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 plate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Horst (geology)
In physical geography and geology, a horst is a raised fault block bounded by normal faults. Horsts are typically found together with grabens. While a horst lifted or remains stationary, the grabens on either side subside. This is often caused by extensional forces pulling apart the crust. Horsts may represent features such as plateaus, mountains, or ridges on either side of a valley. Horsts can range in size from small fault-blocks, up to large regions of stable continent that have not been not folded or warped by tectonic forces. The word ''Horst'' in German means "mass" or "heap," and was first used in the geological sense in 1883 by Eduard Suess in ''The Face of the Earth.''Originally published in 1883 in German as "Das Antlitz der Erde", translated and published in English in 1904 Geomorphology Horsts may have either symmetrical or asymmetrical cross-sections. If the normal faults to either side have similar geometry and are moving at the same rate, the horst is like ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Graben
In geology, a graben () is a depressed block of the crust of a planet or moon, bordered by parallel normal faults. Etymology ''Graben'' is a loan word from German, meaning 'ditch' or 'trench'. The word was first used in the geologic context by Eduard Suess in 1883. The plural form is either ''graben'' or ''grabens''. Formation A graben is a valley with a distinct escarpment on each side caused by the displacement of a block of land downward. Graben often occur side by side with horsts. Horst and graben structures indicate tensional forces and crustal stretching. Graben are produced from parallel normal faults, where the displacement of the hanging wall is downward, while that of the footwall is upward. The faults typically dip toward the center of the graben from both sides. Horsts are parallel blocks that remain between graben; the bounding faults of a horst typically dip away from the center line of the horst. Single or multiple graben can produce a rift valley. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alluvial Fan
An alluvial fan is an accumulation of sediments that fans outwards from a concentrated source of sediments, such as a narrow canyon emerging from an escarpment. They are characteristic of mountainous terrain in arid to semiarid climates, but are also found in more humid environments subject to intense rainfall and in areas of modern glaciation. They range in area from less than to almost . Alluvial fans typically form where flow emerges from a confined channel and is free to spread out and infiltrate the surface. This reduces the carrying capacity of the flow and results in deposition of sediments. The flow can take the form of infrequent debris flows or one or more ephemeral or perennial streams. Alluvial fans are common in the geologic record, such as in the Triassic basins of eastern North America and the New Red Sandstone of south Devon. Such fan deposits likely contain the largest accumulations of gravel in the geologic record. Alluvial fans have also been found on Mar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Basin And Range Province
The Basin and Range Province is a vast physiographic region covering much of the inland Western United States and northwestern Mexico. It is defined by unique basin and range topography, characterized by abrupt changes in elevation, alternating between narrow faulted mountain chains and flat arid valleys or basins. The physiography of the province is the result of tectonic extension that began around 17 million years ago in the early Miocene epoch. The numerous ranges within the province in the United States are collectively referred to as the "Great Basin Ranges", although many are not actually in the Great Basin. Major ranges include the Snake Range, the Panamint Range, the White Mountains, and the Sandia Mountains. The highest point fully within the province is White Mountain Peak in California, while the lowest point is the Badwater Basin in Death Valley at . The province's climate is arid, with numerous ecoregions. Most North American deserts are located within it. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sierra Madre Occidental
The Sierra Madre Occidental is a major mountain range system of the North American Cordillera, that runs northwest–southeast through northwestern and western Mexico, and along the Gulf of California. The Sierra Madre is part of the American Cordillera, a chain of mountain ranges (cordillera) that consists of an almost continuous sequence of mountain ranges that form the western 'sounds' of North America, Central America, South America and West Antarctica. Etymology The Spanish name ''sierra madre'' means "mother mountain range" in English, and ''occidental'' means "western", these thus being the "Western mother mountain range". To the east, from the Spanish ''oriental'' meaning "eastern" in English, the Sierra Madre Oriental range or "Eastern Mother Mountains" runs generally parallel to the Sierra Madre Occidental along eastern Mexico and the Gulf of Mexico. The range extends from northern Sonora, a state near the Mexico–U.S. border at Arizona, southeastwards to the T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mexico
Mexico (Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guatemala, Belize, and the Caribbean Sea; and to the east by the Gulf of Mexico. Mexico covers ,Mexico ''''. . making it the world's 13th-largest country by are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
