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Bryan Mountains
The Bryan Mountains are a small mountain range in the northwestern Sonoran Desert of southwestern Arizona. The range is located in southeastern Yuma County, about southeast of Yuma and about west of Ajo. The range is approximately ten miles long and about three miles wide at its widest point. The highpoint of the range is above sea level and is located at 32°18'27"N, 113°22'46"W (NAD 1983 datum). The range is located entirely within the Cabeza Prieta National Wildlife Refuge. Geologically, the Bryan Mountains are an extension southeastwards of the block faulted Mohawk Mountains, and what are now the Bryan Mountains were actually considered part of the Mohawk Mountains well into the middle of the 20th century. History History of the name The range was named in 1933 by Eldred D. Wilson for Kirk Bryan, a geologist and explorer with the U.S. Geological Survey (USGS) who in the early 1920s conducted a reconnaissance of the area and wrote a detailed guide describing the area's ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sonoran Desert
The Sonoran Desert ( es, Desierto de Sonora) is a desert in North America and ecoregion that covers the northwestern Mexican states of Sonora, Baja California, and Baja California Sur, as well as part of the southwestern United States (in Arizona and California). It is the hottest desert in both Mexico and the United States. It has an area of . In phytogeography, the Sonoran Desert is within the Sonoran Floristic province of the Madrean Region of southwestern North America, part of the Holarctic realm of the northern Western Hemisphere. The desert contains a variety of unique endemic plants and animals, notably, the saguaro (''Carnegiea gigantea'') and organ pipe cactus (''Stenocereus thurberi''). The Sonoran Desert is clearly distinct from nearby deserts (e.g., the Great Basin, Mojave, and Chihuahuan deserts) because it provides subtropical warmth in winter and two seasons of rainfall (in contrast, for example, to the Mojave's dry summers and cold winters). This creates an ex ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mojave Desert
The Mojave Desert ( ; mov, Hayikwiir Mat'aar; es, Desierto de Mojave) is a desert in the rain shadow of the Sierra Nevada mountains in the Southwestern United States. It is named for the indigenous Mojave people. It is located primarily in southeastern California and southwestern Nevada, with small portions extending into Arizona and Utah. The Mojave Desert, together with the Sonoran, Chihuahuan, and Great Basin deserts, forms a larger North American Desert. Of these, the Mojave is the smallest and driest. The Mojave Desert displays typical basin and range topography, generally having a pattern of a series of parallel mountain ranges and valleys. It is also the site of Death Valley, which is the lowest elevation in North America. The Mojave Desert is often colloquially called the "high desert", as most of it lies between . It supports a diversity of flora and fauna. The desert supports a number of human activities, including recreation, ranching, and military training. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
History Of Yuma County, Arizona
Yuma County is a county in the southwestern corner of the U.S. state of Arizona. As of the 2020 census, its population was 203,881. The county seat is Yuma. Yuma County includes the Yuma, Arizona Metropolitan Statistical Area. The county borders three states: Sonora, Mexico, to the south, and two other states to the west, across the Colorado River: California of the United States and the Mexican state of Baja California. Being 63.8% Hispanic in 2020, Yuma is Arizona's largest majority-Hispanic county. History Long settled by Native Americans of indigenous cultures for thousands of years, this area was controlled by the Spanish Empire in the colonial era. In the 19th century, it was part of independent Mexico before the Mexican–American War and Gadsden Purchase. Yuma County was one of four original Arizona counties created by the 1st Arizona Territorial Legislature. The county territory was defined as being west of longitude 113° 20' and south of the Bill Williams River ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mountain Ranges Of The Sonoran Desert
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 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 slumping and other forms of mass wasting, as well as through erosion by rivers and glaciers. High elevations on mountains produce colder climates than at sea level at similar latitude. These colder climates strongly affect the ecosystems of mountains: different elevations have different plants and animals. Because of the less hospitable terrain and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gila Mountains (Yuma County)
The Gila Mountains of Yuma County are a 26-mile (42 km) long mountain range in southwestern Arizona in the northwest Sonoran Desert. The Gila Mountains of Yuma County are a northwest-southeast trending mountain system. The fault-blocked mountain range is attached on the south to the Tinajas Altas Mountains which continue southeast into Sonora, Mexico for another 30 miles. The northwest end of the mountains border the southeast Laguna Mountains. The Gila River flows through the Gila Valley between the Gilas and the Lagunas prior to its confluence with the Colorado. The Gila Mountains are southeast of the confluence of the Colorado and Gila rivers in the Lower Colorado River Valley. The Gila River flows northwest, north around the mountain's north end, then west six miles to the Colorado. On the northeast side of the Gila Range, the low-elevation basin, Dome Valley is created between the Muggins Mountains and the Muggins Mountains Wilderness to the northeast. The blo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copper Mountains
The Copper Mountains is a minor north–south trending mountain range, only 8 miles long in southwestern Arizona in the southwestern Sonoran Desert. The Copper Mountains lie east of Yuma, Arizona and east of the Yuma Desert; also east of the Gila and Tinajas Altas Mountains. It lies on an extensive north-sloping desert plain that drains into the Gila River floodplain close to its confluence and outlet into the southern Colorado River in the Lower Colorado River Valley. The Lechuguilla Desert and Coyote Wash lie west of the mountains; the Tule Desert lies east. The highest point is Coyote Peak at . The communities just north at about 10 miles in the Gila River agricultural valley, are Wellton, Noah, Roll, and Tacna, Arizona. The Copper Mountains lie in the western portion of the Barry M. Goldwater Air Force Range which is used by the MCAS, the Marine Corps Air Station, Yuma; also 3 miles north of the western end of the Cabeza Prieta National Wildlife Refuge. See al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cabeza Prieta Mountains
The Cabeza Prieta Mountains are a mountain range in the northwestern Sonoran Desert of southwest Arizona. It is located in southern Yuma County, Arizona. The mountain range is amongst an eleven-mountain sequence of north-trending ranges and valleys in the hottest region of the Sonoran Desert. This southwestern Arizona region is on the northern perimeter of the Gran Desierto de Altar. It includes the northern part of the Pinacate volcanic field. The Cabeza Prieta Mountains extend northwest–southeast about 24 miles. The highest peak is unnamed at ; other peaks include: Cabeza Prieta Peak at ; Buck Peak-(in north) at ; and Sierra Arida in the south, at . A separate mountain outlier lies southwesterly, Tordillo Mountain at , adjacent to a primitive road paralleling the US-Mexico Border, called ''El Camino del Diablo''. The range is about 36 miles southeast of the Mohawk Valley (Arizona), and Interstate 8 and is in the west-central Barry M. Goldwater Air Force Range. The Cabe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Mountain Ranges Of Arizona
There are 210 named mountain ranges in Arizona.This list also includes mountain ranges that are mostly in New Mexico and Sonora, Mexico, that extend into Arizona. Alphabetical list The southeast of Arizona, with New Mexico, northwest Chihuahua and northeast Sonora contain insular sky island mountain ranges, (the Madrean Sky Islands), or smaller subranges in association. There are also numerous Sonoran Desert ranges, or Arizona transition zone ranges. Northern and northeast Arizona also has scattered ranges throughout. #Agua Caliente Mountains–Yuma County and Maricopa County # Agua Dulce Mountains–Pima County # Aguila Mountains–Yuma County #Ajo Range–Pima County # Alvarez Mountains–Pima County # Aquarius Mountains–Mohave County # Artesa Mountains–Pima County #Artillery Mountains–Mohave County #Atascosa Mountains–Santa Cruz County #Aubrey Hills–Mohave County #''Baboquivari Mountains''–Pima Co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 Valley. Adjacent notable towns at this confluence of CaliforniaArizona, and Baja CaliforniaSonora, are Los Algodones, Baja California, and San Luis Rio Colorado, Sonora. Alphabetical list * Agua Caliente MountainsYuma County * Aguila MountainsYuma County * Bryan MountainsYuma County * Butler MountainsYuma County * Cabeza Prieta MountainsYuma County * Castle Dome MountainsYuma County * Copper MountainsYuma County * Gila Mountains (Yuma County)Yuma County * Kofa MountainsN. Yuma County(S. La Paz County) * Laguna Mountains (Arizona)Yuma County (see also: Laguna Mountains(Calif)) * Little Horn MountainsS. La Paz County(N. Yuma County) * Middle MountainsS. La Paz County(N. Yuma County) * Mohawk MountainsYuma County * Muggins MountainsYuma County * New Water MountainsS. La Paz County(connected to Kofa Mountains, N. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valley And Range Sequence-Southern Yuma County
The Valley and range sequence-Southern Yuma County is a ''3-Valley'' sequence of NW–by–SE trending block faulted valleys and mountains. About eleven major mountain ranges connect to each other in four, (mostly parallel), mountain sequences. This regional parallel valley-mountain sequence ends at the Gila River valley at the north; to the south, it extends to the Gran Desierto de Altar of northwestern Mexico; the sequence is a remnant of the Basin and Range system. List of valleys * ''Coyote Wash'' and Lechuguilla Desert * Mohawk Valley (Arizona) * San Cristobal Valley Table of mountain ranges The three valleys lay mostly between these perimeter mountain sequences. See also * Fault-block mountain Fault blocks are very large blocks of rock, sometimes hundreds of kilometres in extent, created by tectonic and localized stresses in Earth's crust. Large areas of bedrock are broken up into blocks by faults. Blocks are characterized by relat ... External links U.S. Bur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Army Map Service
The Army Map Service (AMS) was the military cartographic agency of the United States Department of Defense from 1941 to 1968, subordinated to the United States Army Corps of Engineers. On September 1, 1968, the AMS was redesignated the U.S. Army Topographic Command (USATC) and continued as an independent organization until January 1, 1972, when it was merged into the new Defense Mapping Agency (DMA) and redesignated as the DMA Topographic Center (DMATC). On October 1, 1996, DMA was folded into the National Imagery and Mapping Agency (NIMA), which was redesignated as the National Geospatial-Intelligence Agency (NGA) in 2003. The major task of the Army Map Service was the compilation, publication and distribution of military topographic maps and related products required by the Armed Forces of the United States. The AMS was also involved in the preparation of extraterrestrial maps of satellite and planetary bodies; the preparation of national intelligence studies; the establishment o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Block Fault
Fault blocks are very large blocks of rock, sometimes hundreds of kilometres in extent, created by tectonic and localized stresses in Earth's crust. Large areas of bedrock are broken up into blocks by faults. Blocks are characterized by relatively uniform lithology. The largest of these fault blocks are called crustal blocks. Large crustal blocks broken off from tectonic plates are called terranes. Those terranes which are the full thickness of the lithosphere are called microplates. Continent-sized blocks are called variously ''microcontinents, continental ribbons, H-blocks, extensional allochthons and outer highs.'' Because most stresses relate to the tectonic activity of moving plates, most motion between blocks is horizontal, that is parallel to the Earth's crust by strike-slip faults. However vertical movement of blocks produces much more dramatic results. Landforms (mountains, hills, ridges, lakes, valleys, etc.) are sometimes formed when the faults have a large vert ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
