Misplaced Pages

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128-590: The Sierra Fría is the southeasternmost range of the Sierra Madre Occidental . The highest peak is Cerro de la Ardilla (3050 m). The Sierra extends north and south, and divides the upper basins of the Juchipila River to the west from the Río Verde to the east. The municipalities of San José de Gracia , Calvillo , Rincón de Romos , Jesús María and Pabellón de Arteaga extend across the range. Much of

256-537: A gunman shot congresswoman Gabby Giffords and 18 others at a gathering in Tucson. Giffords was critically wounded. The incident sparked national attention regarding incendiary political rhetoric. Three ships named USS Arizona have been christened in honor of the state, although only USS Arizona (BB-39) was so named after statehood was achieved. Arizona is in the Southwestern United States as one of

384-622: A marine basin which separated the island arc that came to form the Guerrero terrane from the accretions that came to form the Sierra Madre terrane. It contains a lower formation made up of pillow basalts with pillow breccias , tuffs, and shales underlying a group of pelagic limestones , oozes , and turbidites . Covering the southern basement are sedimentary and metamorphosed sedimentary rocks containing argillite , limestone, volcanic schist , slate , and greywacke which were exposed in

512-416: A source of water , in an otherwise arid environment from the increased precipitation from the mountain range. As such, rivers that have headwaters in the mountains provide water for irrigation in the surrounding lands. The need for water to irrigate prompted the construction of dams, which has been the source of several environmental concerns in the area. The northern end of the range is more arid; hence,

640-488: A base to raid the nearby Mexican settlements, as part of their wars against Mexico. Arizona became a U.S. state on February 14, 1912, coinciding with Valentine's Day . Arizona was the 48th state admitted to the U.S. and the last of the contiguous states to be admitted. Cotton farming and copper mining, two of Arizona's most important statewide industries, suffered heavily during the Great Depression . But during

768-568: A channel over millions of years, and is about 277 miles (446 km) long, ranges in width from 4 to 18 miles (6 to 29 km) and attains a depth of more than 1 mile (1.6 km). Nearly two   billion years of the Earth 's history have been exposed as the Colorado River and its tributaries cut through layer after layer of sediment as the Colorado Plateau uplifted. Arizona is home to one of

896-448: A desert landscape. Oak forests are the predominant plant life, and extend into the lowland deserts. This forest and canyon land provided a place for a variety of indigenous people to live, until Spanish settlers with associated mestizos came into the area to found towns for the silver mines in the area. The major industries in the area now are agriculture and forestry, which have become contentious because of land degradation and

1024-403: A dry heat from 90 to 120 °F (32 to 49 °C), with occasional high temperatures exceeding 125 °F (52 °C) having been observed in the desert area. Arizona's all-time record high is 128 °F (53 °C) recorded at Lake Havasu City on June 29, 1994, and July 5, 2007; the all-time record low of −40 °F (−40 °C) was recorded at Hawley Lake on January 7, 1971. Due to

1152-500: A few towns of note, including Creel, Chihuahua , with 5,000 inhabitants; it serves as a stop on the train line. South of Copper Canyon is the town of El Salto, Durango , situated along highway 40. To the west is Copala, Sinaloa . To the south live the indigenous Cora people in the towns of Jesús María and La Mesa del Nayar. In addition, 1,000 people live in the village of Huajimic in Nayarit. The Bolaños River valley of Jalisco

1280-511: A new U.S. Arizona Territory, consisting of the western half of earlier New Mexico Territory, in Washington, D.C. , on February 24, 1863. These new boundaries would later form the basis of the state. The first territorial capital, Prescott, was founded in 1864 following a gold rush to central Arizona. The capital was later moved to Tucson, back to Prescott, and then to its final location in Phoenix in

1408-617: A series of Paleozoic sedimentary sequences from a deep marine environment underlying it, considered by some to be part of the Cotes Terrane and by others to be transported . In some areas, distinct sedimentary rocks can be identified by shallow-water Silurian and Mississippian sedimentary rocks underlying deep-water Pennsylvanian and Permian , which are divided by Mississippian rhyolite . The Permian clastics contain some detrital rock that sit alongside low-grade metamorphosed sedimentary and volcanic rocks with serpentinite. South of

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1536-413: A series of controversial moves as different regions of the territory gained and lost political influence with the growth and development of the territory. Although names including "Gadsonia", "Pimeria", "Montezuma" and "Arizuma" had been considered for the territory, when 16th President Abraham Lincoln signed the final bill, it read "Arizona", and that name was adopted. ( Montezuma was not derived from

1664-611: A series of folds, thrust , and left lateral faults date from the middle Miocene. This may be evidence for a left transpressional shear zone . The area between this boundary and the Aguascalientes fault is filled with numerous grabens and half-grabens, as well an east–west left shear zone, the El Roble shear zone. At the west end of these grabens and half-grabens are the Pochotitan and the more northerly San Pedro fault systems, which form

1792-567: A smaller scale, mineral deposits are distributed in formations of the Sierra Madre, although the events that placed these deposits vary throughout the mountains. The Guerrero composite terrane contains many of the economic deposits, often found in ore bodies younger than the Cretaceous. Gold and silver deposits most commonly occur in the altered andesites of the early volcanics, typically these deposits are between 30 and 50 million years old. These are believed to be caused by later intrusions into

1920-435: A summer monsoon , and two dry seasons each year. Air pressure changes in northwestern Mexico and the southwest United States are the main causes of seasonal variation in the Sierra Madre. A high pressure area that rests over the mountains in the winter begins to move north of the mountains into New Mexico during the month of June. The high pressure begins to break down and move south during September or October; however,

2048-407: A thick core covered by volcanics and eroded by numerous rivers. Some have suggested that the basement of the mountains have numerous intrusions made by mafic magma . At their surface, the mountains are made up of large-scale ignimbrite sheet that has been incised by rivers flowing from rainfall in the mountains. The surface of the plateau is almost exclusively from the second series of flows causing

2176-654: A total metropolitan population of just over 4.7   million. The average high temperature in July, 106 °F (41 °C), is one of the highest of any metropolitan area in the United States, offset by an average January high temperature of 67 °F (19 °C), the basis of its winter appeal. Tucson , with a metro population of just over one   million, is the state's second-largest city. Located in Pima County , approximately 110 miles (180 km) southeast of Phoenix, it

2304-409: Is a high plateau of volcanic rock that is eroded in areas to reveal a basement composed of plutonic and sedimentary rocks underlying the two groups of extrusive volcanics. The lower of these groups is a series of volcanic rocks formed by lava flows . The surface of the plateau is made up of a second series of volcanic ignimbrites , covered mostly by clay rich organic soils . Some intrusions in

2432-781: 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 consist of an almost continuous sequence that form the western "sounds" of North America , Central America , South America , and West Antarctica . The Spanish name sierra madre means "mother mountain range" in English, and occidental means "western", these thus being

2560-423: Is also a belt of iron deposits further east. Most soil in the mountains is covered by an organic -rich layer over layers rich in clay . Soils are commonly phaeozems that are up to 100 centimetres (39 in). Some soils are cambisols that are less than 2 metres (6.6 ft) deep and well- drained . Due to the high clay content, which blocks water from being absorbed into the soil, larger rock particles in

2688-626: Is an accepted version of this page Arizona ( / ˌ ær ɪ ˈ z oʊ n ə / ARR -iz- OH -nə ; Navajo : Hoozdo Hahoodzo [hoː˥z̥to˩ ha˩hoː˩tso˩] ; O'odham : Alĭ ṣonak [ˈaɭi̥ ˈʂɔnak] ) is a state in the Southwestern region of the United States , sharing the Four Corners region of the western United States with Colorado , New Mexico , and Utah . Its other neighboring states are Nevada to

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2816-745: Is considered as relatively vulnerable to climate change, which can make six of Arizona`s 15 counties uninhabitable for humans by the years 2040–2060. This was the cautionary warning made by a December 2020 study released by ProPublica and Rhodium Group. Phoenix , in Maricopa County , is Arizona's capital and largest city. Other prominent cities in the Phoenix metro area include Mesa (Arizona's third largest city), Chandler (Arizona's fourth largest city), Glendale , Peoria , Buckeye , Sun City , Sun City West , Fountain Hills , Surprise , Gilbert , El Mirage , Avondale , Tempe , Tolleson and Scottsdale , with

2944-553: Is formed by the range is cut by deep river valleys. This plateau is formed from volcanic rock overlying a basement of metamorphic rock. This uplift has caused changes in weather patterns; increased rainfall occurring in the mountains has provided areas where ecosystems can form in wetter areas than surrounding land. This water source forms watersheds that provide the arid surroundings with water that makes it possible to irrigate and farm crops. The wet ecosystems are islands of biodiversity, differing significantly from what would otherwise be

3072-649: Is in Arizona. The Mogollon Rim ( / ˌmoʊ gəˈyoʊn / ), a 1,998-foot (609 m) escarpment , cuts across the state's central section and marks the southwestern edge of the Colorado Plateau. In 2002, this was an area of the Rodeo–Chediski Fire , the worst fire in state history until 2011. Located in northern Arizona, the Grand Canyon is a colorful, deep, steep-sided gorge, carved by the Colorado River . The canyon

3200-450: Is known for a history of conservative politicians such as Barry Goldwater and John McCain , though it has become a swing state in recent years. The state's name appears to originate from an earlier Spanish name, Arizonac , derived from the O'odham name alĭ ṣonak , meaning ' small spring ' . Initially this term was applied by Spanish colonists only to an area near the silver mining camp of Planchas de Plata, Sonora . To

3328-606: Is less well known for its pine-covered north-central portion of the high country of the Colorado Plateau (see Arizona Mountains forests ). Like other states of the Southwest United States, Arizona is marked by high mountains, the Colorado plateau, and mesas. Despite the state's aridity, 27% of Arizona is forest, a percentage comparable to modern-day Romania or Greece. The world's largest stand of ponderosa pine trees

3456-456: Is marked by different volcanic processes. The first was a continuation of the Oligocene flare-up, which lasted through the early Miocene. This may be a distinct second occurrence of the same process, placing silica-rich lava above Oligocene rocks. Also in the early Miocene more intermediate basaltic andesites occur along faults and in grabens. Beginning in the early Miocene and continuing into

3584-602: Is now the state of Arizona was administered by the United States government as part of the Territory of New Mexico from 1850 until the southern part of that region seceded from the Union to form the Territory of Arizona . This newly established territory was formally organized by the federal government of the Confederate States on Saturday, January 18, 1862, when President Jefferson Davis approved and signed An Act to Organize

3712-641: Is one of the Seven Natural Wonders of the World and is largely contained in the Grand Canyon National Park  – one of the first national parks in the United States. President Theodore Roosevelt was a major proponent of designating the Grand Canyon area as a National Park, often visiting to hunt mountain lion and enjoy the scenery. The canyon was created by the Colorado River cutting

3840-645: Is populated with mining communities, such as San Martín de Bolaños , which has a population of around 3,000. Few paved roads cross the mountains, meaning that travel times can be long, even between cities that are relatively close. In the north, Mexico Federal Highway 16 connects Hermosillo , Sonora and La Junta, Chihuahua. In the mountains, the La Entrada al Pacifico Corridor is an incomplete road intended to connect Los Mochis , Sinaloa and Chihuahua. Durango and Mazatlán are connected by highway 40 , around 24 degrees north latitude. The Sierra Madre Occidental

3968-832: The Aguamilpa Dam begun in 1991 and the El Cajón Dam upstream from it. To provide irrigation water for farming the dry basin , the Nazas river was dammed in the 1930s and 1940s. This has led to the former drainage lakes in the area drying up, and soil depletion from the elimination of the river as a source of soil. Due to the continued logging in the area, erosion on the slopes of hillsides has increased. Numerous small populations live in Copper Canyon, some of them around old missions. Many settlements consist of single families or small family groups near agricultural fields. There are also

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4096-745: The Arizona Biltmore Hotel in central Phoenix (opened 1929) and the Wigwam Resort on the west side of the Phoenix area (opened 1936). Arizona was the site of German prisoner of war camps during World War   II and Japanese American internment camps . Because of wartime fears of a Japanese invasion of the U.S. West Coast (which in fact materialized in the Aleutian Islands Campaign in June 1942), from 1942 to 1945, persons of Japanese descent were forced to reside in internment camps built in

4224-531: The Arizona Legislature enacted the Stupid Motorist Law . It is rare for tornadoes or hurricanes to occur in Arizona. Arizona's northern third is a plateau at significantly higher altitudes than the lower desert, and has an appreciably cooler climate, with cold winters and mild summers, though the climate remains semiarid to arid. Extremely low temperatures are not unknown; cold air systems from

4352-702: The Aztec emperor, but was the sacred name of a divine hero to the Pima people of the Gila River Valley . It was probably considered – and rejected – for its sentimental value before Congress settled on the name "Arizona".) Brigham Young , leader of the Church of Jesus Christ of Latter-day Saints in Salt Lake City in Utah , sent Mormons to Arizona in

4480-479: The Four Corners states. Arizona is the sixth largest state by area , ranked after New Mexico and before Nevada . Of the state's 113,998 square miles (295,000 km ), approximately 15% is privately owned. The remaining area is public forest and parkland, state trust land and Native American reservations. There are 24 National Park Service maintained sites in Arizona, including the three national parks of Grand Canyon National Park , Saguaro National Park , and

4608-598: The Grand Canyon . This plateau has an average elevation of 2,250 m (7,380 ft) with most of the more eroded canyons on the western slope, due to the higher moisture content. The highest elevations occur in the Tarahumara range. The exact elevations of the highest peaks are not known within accurate enough ranges to determine their relative elevation. The highest point is probably Cerro Mohinora , located at 25°57′N 107°03′W  /  25.950°N 107.050°W  / 25.950; -107.050 . Estimates for

4736-438: The Gulf of Mexico . On the western side of the mountains, which are affected by the largest change in precipitation between the dry season and monsoon season, in the monsoon season rainfall can exceed 300 mm (12 in) in a single month. The southern region receives more of the rainfall than the northern. Much of this precipitation occurs as tropical storms . As the high pressure over New Mexico breaks down, rainfall in

4864-539: The Navajo Nation , the largest in the state and the country, with more than 300,000 citizens. Since the 1980s, the proportion of Hispanics has grown significantly owing to migration from Mexico and Central America. A substantial portion of the population are followers of the Roman Catholic Church and the Church of Jesus Christ of Latter-day Saints . Arizona's population and economy have grown dramatically since

4992-722: The Nazas River and Aguanaval River drain the mountains into a closed basin. These mountains supply 90% of the water used for irrigation within the watershed. North of this system is the Conchos River which drains into the Rio Grande . Along many rivers the arid conditions have caused courses to be dammed to provide water for irrigation. These dams have caused concerns along with those caused by other activities. The Yaqui has been dammed with three large reservoirs along its course. The Río Grande de Santiago has also been dammed, including

5120-473: The Petrified Forest National Park . Arizona is well known for its desert Basin and Range region in the state's southern portions, which is rich in a landscape of xerophyte plants such as the cactus . This region's topography was shaped by prehistoric volcanism , followed by the cooling-off and related subsidence . Its climate has exceptionally hot summers and mild winters. The state

5248-596: The Sierra Madre del Sur and the Eje Volcánico Transversal (Transverse Volcanic Axis) of central Mexico after crossing 1,250 km (780 mi). The mountains range from 300 km (190 mi) from the Gulf of California in the north, but begin to approach within 50 km (30 mi) of the Pacific in the south. These mountains are generally considered to be part of the much larger American cordillera ,

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5376-616: The Yaqui River , which drains that area, is an important source of irrigation in the state of Sonora. The Yaqui drains into the Gulf of California , as do the Fuerte River in Sinaloa and the Humaya River further south. The Río Grande de Santiago drains 100,000 km (39,000 sq mi) from the southern slopes of the Sierra Madre. Along the more arid eastern slopes of the mountains,

5504-428: The eastern cottontail , which lives in the forests of the western slopes, cliff chipmunk , rock squirrel , Mexican fox squirrel , and various species of Cricetidae . Raccoons , hog-nosed skunk , and hooded skunk live in the mountains. The white-nosed coati lives on the western slopes, and the ring-tailed cat lives throughout. Many species of bats live in the mountains also. A variety of lizards live in

5632-438: The golden eagle ( Aquila chrysaetos ), peregrine falcon ( Falco peregrinus ), Harris's hawk ( Parabuteo unicinctus ), Mexican spotted owl ( Strix occidentalis lucida ), great horned owl ( Bubo virginianus ), eared quetzal ( Euptilotis neoxenus ), Montezuma quail ( Cyrtonyx montezumae ), lesser scaup ( Aythya affinis ), and northern pintail ( Anas acuta ). The Sierra is designated and Important Bird Area . Much of

5760-787: The "Western mother mountain range". To the east, from the Spanish oriental meaning "eastern" in English, the Sierra Madre Oriental range or "Eastern mother mountain range" 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 , southeast towards to the Trans-Mexican Volcanic Belt and Sierra Madre del Sur ranges. The high plateau that

5888-475: The 1690s and early 18th century. Spain founded presidios ("fortified towns") at Tubac in 1752 and Tucson in 1775. When Mexico achieved its independence from the Kingdom of Spain and its Spanish Empire in 1821, what is now Arizona became part of its Territory of Nueva California , ("New California"), also known as Alta California ("Upper California"). Descendants of ethnic Spanish and mestizo settlers from

6016-520: The 1920s and even the 1930s, tourism began to develop as the important Arizonan industry it is today. Dude ranches, such as the K L Bar and Remuda in Wickenburg, along with the Flying V and Tanque Verde in Tucson, gave tourists the chance to take part in the flavor and activities of the "Old West". Several upscale hotels and resorts opened during this period, some of which are still top tourist draws. They include

6144-519: The 1950s because of inward migration, and the state is now a major hub of the Sun Belt . Cities such as Phoenix and Tucson have developed large, sprawling suburban areas. Many large companies, such as PetSmart and Circle K , have headquarters in the state, and Arizona is home to major universities, including the University of Arizona , Arizona State University , and Northern Arizona University . The state

6272-523: The American garrison launched an assault into Nogales, Mexico . The Mexicans eventually surrendered after both sides sustained heavy casualties. A few months earlier, just west of Nogales, an Indian War battle had occurred, considered the last engagement in the American Indian Wars , which lasted from 1775 to 1918. U.S. soldiers stationed on the border confronted Yaqui Indians who were using Arizona as

6400-576: The Cortes and Carborca Terranes is the San José de García Terrane, which is a combination of Cretaceous arc volcanics and volcaniclastics , which may be thrusting over the Cortes terrane. The southern part of the range is made up of the Guerrero Composite Terrane, a large body, which is actually a complex of five different subterranes, not all of them within the main body of the Sierra Madre. However,

6528-528: The European settlers, the O'odham pronunciation sounded like Arissona . The area is still known as alĭ ṣonak in the O'odham language. Another possible origin is the Basque phrase haritz ona ' the good oak ' , as there were numerous Basque sheepherders in the area. A native-born Mexican of Basque ancestry established the ranchería ( small rural settlement ) of Arizona between 1734 and 1736 in

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6656-617: The Mexican towns just across the border from Arizona settlements. Throughout the revolution, many Arizonans enlisted in one of the several armies fighting in Mexico. Only two significant engagements took place on U.S. soil between U.S. and Mexican forces: Pancho Villa 's 1916 Columbus Raid in New Mexico and the Battle of Ambos Nogales in 1918 in Arizona. After Mexican federal troops fired on U.S. soldiers,

6784-638: The North, and a number of different accreted terranes , which are mostly covered by Cenozoic volcanism. The northern extent of the Sierra Madre is the Cortés Terrane, although the northern extreme of this contains a small portion of the Carborca Terrane. Some of the northern end may also be underlain by a Precambrian basement placed around the same time as the Grenville Orogeny . Some of this area has

6912-601: The Pacific Ocean during the winter and a monsoon in the summer. The monsoon season occurs toward the end of summer. In July or August, the dewpoint rises dramatically for a brief period. During this time, the air contains large amounts of water vapor . Dewpoints as high as 81   °F (27   °C) have been recorded during the Phoenix monsoon season. This hot moisture brings lightning , thunderstorms , wind, and torrential, if usually brief, downpours. These downpours often cause flash floods , which can turn deadly. In an attempt to deter drivers from crossing flooding streams,

7040-657: The Pacific. In addition to gold and silver and their related deposits, tin , iron , and mercury occur, sometimes in later units, mostly in later volcanics, and Molybdenum occurs in the mountains, often along with older copper deposits or in Oligocene deposits in the east. The belt of tin deposits lies mostly within the eastern slopes from Durango to Guanajuato. In these areas, tin occurs in rhyolitic ignimbrites in many, possibly over 1000, small deposits of cassiterite . Typically these deposits are divided from overlying ignimbrites by breccia, which may also contain ore. Many of these are thought to be hydrothermal deposits To

7168-433: The Phoenix metropolitan area. Situated in pine tree forests at an elevation of about 5,500 feet (1,700 m), Prescott enjoys a much cooler climate than Phoenix, with average summer highs around 88 °F (31 °C) and winter temperatures averaging 50 °F (10 °C). Yuma is the center of the fourth-largest metropolitan area in Arizona. Located in Yuma County , it is near the borders of California and Mexico. It

7296-427: The Sierra Madre Occidental include tufted jay , the "gray-eared" subspecies of red warbler , eared quetzal , thick-billed parrot , and formerly included the imperial woodpecker , which now may be extinct. The rivers and streams of the range contain some of the southernmost trout populations in North America. These populations may be native, although this is not universally accepted. Invasive fish compete with

7424-405: The Sierra Madre ends. Because of the monsoon, the summer accounts for the majority of rainfall in the area. The spring and fall dry season separate out a weaker wet season in the winter. In addition to increasing in the southern ranges of the mountains, rainfall increases in the higher elevations of the Sierra Madre Occidental. Humidity in the mountains varies at wide levels as does rainfall. In

7552-399: The Sierra Madre from the central Mexican Plateau . The more southern one is the north–south Aguascalientes fault extending 150 kilometres (93 mi) from Altos de Jalisco to near Zacatecas, where it joins the more northern northwest–southeast trending San Luis–Tepehuanes fault extending from Guanajuato to Durango. The southern boundary of the Sierra Madre Occidental with the Jalisco block is

7680-419: The Sierra at lower elevations. The area is rich in wildlife. Native mammals include white-tailed deer ( Odocoileus virginianus ), puma ( Puma concolor ), collared peccary ( Dicotyles tajacu ), ringtail ( Bassariscus astutus ), and gray fox ( Urocyon cinereoargenteus ). 109 species of birds have been recorded in the range, of which 67% are year-round residents and 33% are winter visitors. These include

7808-413: The Southern Cordilleran Basaltic Andesite Suite. The tuffs are above a thick formation of lava rock. Around five or six units have been identified, mostly around the Copper Canyon area. These tuffs have allowed wide-ranging correlation with formations in other geographical areas, for example Death Valley . During the Miocene, three periods of volcanism marked separate events in the Sierras. Each period

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7936-459: The Territory of Arizona , marking the first official use of the name "Territory of Arizona". The Southern territory supplied the Confederate government with men, horses, and equipment. Formed in 1862, Arizona scout companies served with the Confederate States Army during the American Civil War . Arizona has the westernmost military engagement on record during the Civil War with the Battle of Picacho Pass (1862). The Federal government declared

8064-406: The Union, achieving statehood on February 14, 1912. Historically part of the territory of Alta California and Nuevo México 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, where the area became part of the territory of New Mexico . The southernmost portion of the state

8192-625: The United States during World War   II. Their experiences resulted in a rising activism in the postwar years to achieve better treatment and civil rights after their return to the state. After Maricopa County did not allow them to register to vote, in 1948 veteran Frank Harrison and Harry Austin, of the Mojave-Apache Tribe at Fort McDowell Indian Reservation , brought a legal suit, Harrison and Austin v. Laveen , to challenge this exclusion. The Arizona Supreme Court ruled in their favor. Arizona's population grew tremendously with residential and business development after World War   II, aided by

8320-403: The activity of magmatism in the area, forming the first major igneous series in the area. The igneous series are made up of formations of plutonic and volcanic rock, which would later be exposed. Interbedded with these rocks are sedimentary deposit rocks. In the center of the range, some of these rocks have been deformed by tectonic forcing that occurred at the same time. The southern part of

8448-490: The animal may have been extirpated; the black bear population is small, and the Mexican grizzly bear that once resided here is confirmed extinct. Jaguars and ocelots are also now rare. On the other hand, mountain lion and bobcat are more common. On the eastern slopes there are American badger , coyote and gray fox that live across the mountains. Native ungulates include the white tailed deer , mule deer , and collared peccary . Rodents and lagomorphs include

8576-437: The area and surroundings. The Tarahumara frog lives in the oak and pine stands preferring moving water to pools. The southern extent of the Sonoran mountain kingsnake 's range is the Chihuahuan desert into the mountains. Other snakes and frogs live in the mountains, and many species live in the western slopes. Birds frequent the mountains, some as a migratory path and others as native species . The migratory birds often use

8704-450: The area have deposited ore veins that are commercially viable. The landscape was shaped after rock placement. Rivers cut valleys into the plateau, following folds in the rocks. Rocks have broken off of the slopes, forming rocky sides. The bedrock is covered by the clay rich soils, except in eroded areas, where water carries away deposits leaving a stony surface. The basement is thought to be Older North American basement, especially in

8832-443: The area in 1540–1542 during its search for Cíbola . Few Spanish settlers migrated to Arizona. One of the first settlers in Arizona was José Romo de Vivar . Father Kino was the next European in the region. A member of the Society of Jesus (" Jesuits "), he led the development of a chain of missions in the region. He converted many of the Indians to Christianity in the Pimería Alta (now southern Arizona and northern Sonora ) in

8960-442: The area to the west as an overwintering area, and migrate north along the western slopes. In the northern canyons birds may be divided into different habitats , or more specifically, the different types of forest, leading to differences in range by elevation. Some of this difference by elevation may even extend the range of some species, enabling tropical species to use the mountain valleys for migration. Bird species endemic to

9088-421: The area typically have large responses to the change in climate with each season. Monsoon season is the largest of these effects, with leaf buds following only a few months after the rains begin. Flowering season occurs in the months preceding the summer monsoon. This is only the peak flowering season, with plants flowering throughout the year. Due to the early flowering, fruit is ripe and seeds are dispersed at

9216-422: The area, by combining species from different regions. Animals typically associated with arid and mountainous habitats share the mountains with species associated with habitats further south. There are many carnivorous and omnivorous mammals native to the area, although several are extirpated or are part of threatened populations. The Mexican wolf 's range in the mountains is limited to the foothills of Durango or

9344-454: The areas of Flagstaff , Sunrise , and Tucson . In addition to the internationally known Grand Canyon National Park , which is one of the world's seven natural wonders , there are several national forests , national parks , and national monuments . Arizona is home to a diverse population. About one-quarter of the state is made up of Indian reservations that serve as the home of 27 federally recognized Native American tribes , including

9472-400: The beginning of the rains. There are also areas where plants have little response to the seasons, particularly those areas that experience moist conditions, caused by the elevations. These plants may maintain leaves through times when other areas are in the dry season, during which most deciduous trees have no leaves. The mountains are often a corridor for species allowing more diversity in

9600-582: The breakdown is usually at a slower pace than the movement north. This high pressure belt is associated with the mechanics that form the Bermuda High . The climate in the mountains is mild. Summer temperatures maintain a constant level. Maximum temperatures are typically in July at around 31 C with average temperatures of the order of 16 C during this same period. Mean annual temperatures are between 13–18 °C (55–65 °F) above 1,800 metres (6,000 ft). Below-freezing temperatures can occur in

9728-577: The canyon of the Santiago River. Near these sediments late Oligocene to early Miocene granite and granodiorite intrusive bodies occur. A possible cause of this is that these bodies were roof pendants which were uplifted by plutons . Mesozoic limestone also occurs in northern portion of the mountains, mostly from the Cretaceous. Towards the end of the Cretaceous , the Laramide orogeny increased

9856-536: The city in the Tucson Mountains , is the site of the world's largest collection of Saguaro cacti. The Prescott metropolitan area includes the cities of Prescott, Cottonwood , Camp Verde and many other towns in the 8,123 square miles (21,000 km ) of Yavapai County area. With 212,635 residents, this cluster of towns is the state's third largest metropolitan area. The city of Prescott (population 41,528) lies approximately 100 miles (160 km) northwest of

9984-605: The colonial years still lived in the area at the time of the arrival of later European-American migrants from the United States. During the Mexican–American War (1847–1848), the U.S. Army occupied the national capital of Mexico City and pursued its claim to much of northern Mexico, including what later became Arizona Territory in 1863 and later the State of Arizona in 1912. The Treaty of Guadalupe Hidalgo (1848) specified that, in addition to language and cultural rights of

10112-495: The current Mexican state of Sonora . It became notable after a significant discovery of silver there around 1737. The misconception that the state's name purportedly originated from the Spanish term Árida Zona ' Arid Zone ' is considered a case of folk etymology . For thousands of years before the modern era, Arizona was home to many ancient Native American civilizations. Hohokam , Mogollon , and Ancestral Puebloan cultures were among those that flourished throughout

10240-626: The early flows. Fissure-vein deposits have been divided into two groups of fissure vein deposits, which are divided geographically into an eastern and western series. In the east, the gold and silver are accompanied by lead and zinc . In the south, the Bolaños mine district is contained with the Bolaños Graben. Some also occur as epithermal deposits. Also, some gold occurs along with copper in Cenozoic iron-oxide skarn and replacement deposits along

10368-460: The early morning before dawn, the air is almost saturated (often over 90% relative humidity ) near the mountain tops with low clouds over the range. Lower in the range, air is not as near saturated in the morning. Seasonal variation in humidity is also present with average May and June relative humidity around 50%, with 25% possible during the day. Also during the day, relative humidity drops and cloud levels rise as temperatures rise. The humidity of

10496-611: The east of these units is a belt of more mercury deposits, followed by another belt of manganese deposits, although these deposits are mostly limited to Chihuahua and Hidalgo. Iron occurs in three different regions placed by different mechanisms. Along the Pacific there the numerous skarn and replacement deposits mentioned above with relation to gold. Iron occurs in Durango in the form of magnetite lava flows, which are often surrounded by smaller hematite deposits, thought to be ash flows. There

10624-404: The eastern slopes have increased organic content and a clay heavy layer that is developed more than those of the more arid eastern lands. The thickness of soil layers also increases. Problems with soil degradation have been aggravated by the cultivation of drug crops, leading to deforestation of many areas. Other problems include overgrazing , which has led to terracing from cattle paths and

10752-591: The existing inhabitants of former Mexican citizens being considered as inviolable, the sum of $ 15   million in compensation (equivalent to $ 528,230,769.23 in 2023) be paid to the Republic of Mexico. In 1853, the U.S. acquired the land south below the Gila River from Mexico in the Gadsden Purchase along the southern border area as encompassing the best future southern route for a transcontinental railway. What

10880-422: The formation of a soil crust , and soil acidification , which poses a risk to some grasslands as of 2002. The climate varies considerably between the northern and southern extents of this long mountain range. Seasonal variations also occur due to the presence of large bodies of warm water delivering warm damp air from each side of the range. This region undergoes a seasonal variety with two wet seasons, including

11008-609: The height of the mountain start around 3,040 m (9,970 ft) and go up to 3,300 m (10,800 ft). However, Cerro Barajas, at 26°24′N 106°5′W  /  26.400°N 106.083°W  / 26.400; -106.083 , may be as high as 3,300 m (10,800 ft) although other sources give 3,170 m (10,400 ft) as the elevation. Cerro Gordo, at 23°12′N 104°57′W  /  23.200°N 104.950°W  / 23.200; -104.950 , may have an elevation between 3,350 m (10,990 ft) and 3,340 m (10,960 ft). The southern end of

11136-467: The higher mountains, with precipitation occurring as snowfall certain times of year. During the summer monsoon, wind patterns undergo large-scale changes. In May there is very little large-scale wind current through the mountains, most circulates around the mountains, although onshore flow is present. As the high pressure moves north, air is pulled off the Gulf of Mexico, bringing easterly winds aloft to

11264-465: The interior basins . These faults are commonly covered by alluvium and basalt , making them difficult to discern, but can be found in certain fault blocks . Grabens have formed in the north, and some of these are filled with volcanic and sedimentary floors, and long depressions have formed in the southern Sierra Madre. The faulting decreases in the center of the range where the faults are mostly small normal faults , but increases once again on

11392-534: The interior of the country. Many lost their homes and businesses. The camps were abolished after World War   II. The Phoenix-area POW camp site for Germans was purchased after the war by the Maytag family (of major home appliance fame). It was developed as the site of the Phoenix Zoo . A Japanese-American internment camp was on Mount Lemmon , just outside the state's southeastern city of Tucson. Another POW camp

11520-418: The level of the surrounding plain. The crater itself is nearly a mile (1.6 kilometers) wide and 570 feet (170 m) deep. Arizona is one of two U.S. states, along with Hawaii, that does not observe Daylight Saving Time , though the large Navajo Nation in the state's northeastern region does. Due to its large area and variations in elevation, the state has a wide variety of localized climate conditions. In

11648-518: The lower elevations the climate is primarily desert, with mild winters and extremely hot summers. Typically, from late fall to early spring, the weather is mild, averaging a minimum of 60 °F (16 °C). November through February are the coldest months, with temperatures typically ranging from 40 to 75 °F (4 to 24 °C), with occasional frosts. About midway through February, the temperatures start to rise, with warm days, and cool, breezy nights. The summer months of June through September bring

11776-542: The mid- to late 19th century. They founded Mesa , Snowflake , Heber , Safford , and other towns. They also settled in the Phoenix Valley (or "Valley of the Sun"), Tempe , Prescott , and other areas. The Mormons settled what became northern Arizona and northern New Mexico. At the time these areas were in a part of the former New Mexico Territory . During the nineteenth century, a series of gold and silver rushes occurred in

11904-549: The middle, an arc of andesite was placed during the spreading of the Gulf of California . The basin and range-style faulting of the middle-late Miocene took place at the same time as the placement of alkali basalts , In the westernmost slopes mafic dikes formed. These events have also been linked to the subduction of the Farallon Plate . Episodes of volcanism continued into the Quaternary . The Sierras are believed to be

12032-476: The monsoon season. Precipitation varies on both annual and seasonal scales in the Sierra Madre. Annual differences in regional climate are associated with the El Niño-Southern Oscillation with El Niño years leading to a wetter climate. Monsoon rains come to the Sierra Madre in June as the high pressure area moves north, leading to wet summer seasons. This causes east winds bringing moisture from

12160-474: The most well-preserved meteorite impact sites in the world. Created around 50,000 years ago, the Barringer Meteorite Crater (better known simply as " Meteor Crater ") is a gigantic hole in the middle of the high plains of the Colorado Plateau, about 25 miles (40 km) west of Winslow . A rim of smashed and jumbled boulders, some of them the size of small houses, rises 150 feet (46 m) above

12288-495: The mountains extending from Alaska down to these across western North America. Sierra Tarahumara or Tarahumara is the name for the region of the Sierra Madre beginning at the Durango border and extending north. This name comes from the Tarahumara natives. This is a dramatic landscape of steep mountains formed by a high plateau that has been cut through with canyons including Copper Canyon , larger and, in places, deeper than

12416-678: The mountains may be referred to as the Sierra Huichola. In this area, the Sierra Madre begins to give way to the Basin and Range Province . Subranges of this area include the Sierra de Alica and the Sierra Pajaritos , both in Nayarit, and the Sierra los Huicholes , Sierra de Morones , Sierra Nochistlán, and Sierra Fría extending eastwards into Jalisco, Zacatecas, and Aguascalientes. The mountains act as

12544-417: The mountains. On the east slope of the mountain, daytime upslope winds flow to the crest, where the flow joins westerly winds. The mountains cause convection during the following monsoon season, during which nocturnal winds at low levels in the atmosphere move moisture overnight. Extensive lightning activity occurs during this season. After the high pressure breaks down, wind patterns return to those prior to

12672-620: The native population's opposition to these practices. The range trends from the north to southeast. Canyons cut by the rivers of the wet western slopes exist in addition to those of the northeast slopes, notably the Copper Canyon . The range runs parallel to the Pacific coast of Mexico, from just south of the Arizona-Sonora border southeast through eastern Sonora , western Chihuahua , Sinaloa , Durango , Zacatecas , Nayarit , Jalisco , Aguascalientes to Guanajuato , where it joins with

12800-527: The native species which has been a cause of concern among researchers, along with concerns about the effects of logging on these species. The Sonoran Desert is found in the northwestern foothills at 1,000–2,000 m (3,300–6,600 ft). The Chihuahuan Desert is found to the northeast and east, the Meseta Central matorral and Central Mexican matorral to the southeast, and the Sinaloan dry forests to

12928-573: The needs of senior citizens and attracted many retirees who wanted to escape the harsh winters of the Midwest and the Northeast . Sun City , established by developer Del Webb and opened in 1960, was one of the first such communities. Green Valley , south of Tucson, was another such community, designed as a retirement subdivision for Arizona's teachers. Many senior citizens from across the United States and Canada come to Arizona each winter and stay only during

13056-442: The northern states and Canada occasionally push into the state, bringing temperatures below 0 °F (−18 °C) to the state's northern parts. Indicative of the variation in climate, Arizona is the state which has both the metropolitan area with the most days over 100 °F (38 °C) ( Phoenix ), and the metropolitan area in the lower 48 states with the most days with a low temperature below freezing ( Flagstaff ). Arizona

13184-484: The northwest and California to the west. It also shares an international border with the Mexican states of Sonora and Baja California to the south and southwest. It is the 6th-largest and the 14th-most-populous of the 50 states. Its capital and largest city is Phoenix , which is the most populous state capital in the United States. Arizona is the 48th state and last of the contiguous states to be admitted to

13312-496: The primarily dry climate, large diurnal temperature variations occur in less-developed areas of the desert above 2,500 ft (760 m). The swings can be as large as 83   °F (46   °C) in the summer months. In the state's urban centers, the effects of local warming result in much higher measured night-time lows than in the recent past. Arizona has an average annual rainfall of 12.7 in (323 mm), which comes during two rainy seasons, with cold fronts coming from

13440-401: The range are the major determining factors in the dominant plants. Oaks dominate the lower reaches of the mountains, where stands grow down to about 1,000 m (3,300 ft). Some oak species even continue into the surrounding ecosystems. In the western slopes of the range, cloud forest also occurs, mostly on mid-elevation slopes with little exposure to wind or sun in the southern end of

13568-514: The range contains none of the volcanism that is apparent in the northern range. These formations ended in the Paleocene . Eocene volcanism formed a series of andesitic and rhyolitic formations in the area, with spatial and temporal variations throughout. Most of the gold and silver deposits are also in these rocks. In the Oligocene, ash flows became the predominant deposit of the area, with interbedded lava flows between. These ash flows began

13696-522: The range is also influenced by the same seasonal changes as rainfall. In the dry season dew points are low at high elevations (500 hPa), around −22 °C (−8 °F) in the south of the range, and −24 and −26 °C (−11 and −15 °F) in the north in May. In June, dew points begin to increase from the May levels up to −20 °C (−4 °F) in the north and −16 °C (3 °F) in the south. By July these dew points are at −14 °C (7 °F) throughout

13824-471: The range is in protected areas, including the Cuenca Alimentadora del Distrito Nacional de Riego 043 Estado de Nayarit and Cuenca Alimentadora del Distrito Nacional de Riego 01 Pabellón . Camping, hiking, nature walks, horseback riding, and mountain biking are permitted, and hunting and sport fishing are permitted with prior permission. Sierra Madre Occidental The Sierra Madre Occidental

13952-424: The range, but the forests in the mountains vary by elevation and place in the range. This ecoregion is noted for its high biodiversity and large number of endemic species, and for allowing some species to extend their range . The dominant plants vary across the range, and the habitat that they present varies from scattered woodland to both deciduous and coniferous forest. The elevation and latitude in

14080-442: The range. At higher elevations pines begin to grow alongside the oaks, and pines begin to dominate the oaks at higher elevations. At high elevations and in the north, mixed conifer forests become the dominant ecosystem. These forests are composed primarily of pines and firs , which begin to grow at these elevations. There are also grasslands on some mountain tops, surrounded by the forest that occur in those areas. Plants in

14208-405: The range. The range allows higher dew points throughout these periods than the surrounding low lands. This rise in humidity accompanies the monsoon. The mountains create a diverse setting for plants and animals by creating a different set of conditions from the surroundings. The Sierra Madre Occidental pine-oak forests are found at elevations of 1,500–3,000 m (4,900–9,800 ft) throughout

14336-415: The rock that is most visible to be ignimbrites with lava flow layers. The region has a general strike from just west of north to just south of east. Faults in the area tend to be younger than the upper volcanics, excluding those associated with calderas, but do occur in distinct periods. The large faults along the eastern slope have caused the slope to be made up of large escarpments that face into

14464-435: The second series of high magmatism formations. The Mid-Tertiary ignimbrite flare-up formed a series of ignimbrite formations, layered one atop another, that are sometimes broken by lava flows. The ignimbrite formations in this area cover the largest area of any known series, with ten calderas identified in the province. Three of these calderas are in Copper Canyon. The lava has formed a series of mafic rocks that comprise

14592-465: The soil help reduce runoff and soil losses from erosion. Areas that are covered in stone are known as lithosols , and make up most of the remaining surface in the mountains, especially on upper slopes. The last major soil type are vertisols , which are thin mineral-poor soils. Soils at higher elevations experience more leaching , due to increased rainfall. Acidic soils may have lower calcium content, leading to lower plant soil quality . Soils along

14720-516: The state. In 2004, voters passed Proposition 200 , requiring proof of citizenship to register to vote. The Supreme Court of the United States struck this restriction down in 2013. In 2010, Arizona enacted SB 1070 which required all immigrants to carry immigration papers at all times, but the Supreme Court also invalidated parts of this law in Arizona v. United States in 2012. On January 8, 2011,

14848-484: The state. Many of their pueblos, cliffside dwellings, rock paintings and other prehistoric treasures have survived and attract thousands of tourists each year. In 1539, Marcos de Niza , a Spanish Franciscan , became the first European to contact Native Americans. He explored parts of the present state and made contact with native inhabitants, probably the Sobaipuri . The expedition of Spanish explorer Coronado entered

14976-487: The surrounding area is a subtropical highland climate with heavy thunderstorms and rainfall common during the summer months and snowfall is rare, occurring once per year. Higher elevations of the range are covered in pine–oak woodland , with pines and/or oaks as the dominant trees, with manzanillo ( Arbutus spp.) and juniper . Areas that have been logged are covered in thickets of manzanillo, and montane grasslands occur on canyon slopes. Matorral (dry shrubland) surrounds

15104-583: The terrane is mostly covered by volcanics and sedimentary deposits, so it is only visible where erosion has revealed it. The main subterranes of the Guerrero Composite Terrane that are within the Sierra Madre are the Tahue and Zihuatanejo terranes. Dividing the Guerrero Terrane from the rest of the Sierra Madre terranes is a boundary that is thought to represent the Early Cretaceous Arperos Basin,

15232-577: The territory producing more copper than any other state by 1907, which earned Arizona the nickname "the Copper State" at the time of statehood. During the first years of statehood the industry experienced growing pains and labor disputes with the Bisbee Deportation of 1917 the result of a copper miners' strike. During the Mexican Revolution from 1910 to 1920, several battles were fought in

15360-457: The territory, the best known being the 1870s stampede to the silver bonanzas of Tombstone, Arizona , in southeast Arizona, also known for its legendary outlaws and lawmen. By the late 1880s, copper production eclipsed the precious metals with the rise of copper camps like Bisbee, Arizona , and Jerome, Arizona . The boom and bust economy of mining also left hundreds of ghost towns across the territory, but copper mining continued to prosper with

15488-449: The west and southwest. These lower elevations are usually graded into by a stand of tropical deciduous forest , which has a large portion of flora made up of flowering plants and legumes . These flowering plants are mostly from the genus Bursera . The ecotone , made up of the tropical deciduous forest, is commonly sparsely populated, sometimes only by small stands of trees. It may be referred to as savanna . Arizona This

15616-602: The western boundary of the faults in the southern mountains. In the north there is an unknown boundary between the Cortes Terrane and the Guerrero Composite Terrane. Some theorize that this is a section of the Mojave–Sonora Megashear, but this theory is not universally accepted; however, the Megashear is important, and, in fact, is necessary for reconstructions of the opening of the Gulf of California, as of 2003. On

15744-410: The western slope. In fact, the major normal faults tend to diverge around the center of the core and join at either end. Some of these faults may have allowed ignimbrites to erupt from the surface, and so there may be some association between the ignimbrite occurrence and faults; this can be used to find out information about different kinds of basement rock present. There are two faults dividing

15872-619: The widespread use of air conditioning , which made the intensely hot summers more comfortable. According to the Arizona Blue Book (published by the Arizona Secretary of State 's office each year), the state population in 1910 was 294,353. By 1970, it was 1,752,122. The percentage growth each decade averaged about 20% in the earlier decades, and about 60% each decade thereafter. In the 1960s, retirement communities were developed. These age-restricted subdivisions catered exclusively to

16000-515: The winter months; they are referred to as snowbirds . In March 2000, Arizona was the site of the first legally binding election ever held over the internet to nominate a candidate for public office. In the 2000 Arizona Democratic Primary, under worldwide attention, Al Gore defeated Bill Bradley . Voter turnout in this state primary increased more than 500% over the 1996 primary. In the 21st century, Arizona has frequently garnered national attention for its efforts to quell illegal immigration into

16128-513: Was acquired in 1853 through the Gadsden Purchase . Southern Arizona is known for its desert climate, with very hot summers and mild winters. Northern Arizona features forests of pine, Douglas fir , and spruce trees; the Colorado Plateau ; mountain ranges (such as the San Francisco Mountains ); as well as large, deep canyons , with much more moderate summer temperatures and significant winter snowfalls. There are ski resorts in

16256-464: Was incorporated in 1877, making it the oldest incorporated city in Arizona. It is home to the University of Arizona . Major incorporated suburbs of Tucson include Oro Valley and Marana northwest of the city, Sahuarita south of the city, and South Tucson in an enclave south of downtown. It has an average July temperature of 100   °F (38   °C) and winter temperatures averaging 65   °F (18   °C). Saguaro National Park , just west of

16384-664: Was near the Gila River in eastern Yuma County . Arizona was also home to the Phoenix Indian School , one of several federal Indian boarding schools designed to assimilate Native American children into mainstream European-American culture. Children were often enrolled in these schools against the wishes of their parents and families. Attempts to suppress native identities included forcing the children to cut their hair, to take and use English names, to speak only English, and to practice Christianity rather than their native religions. Numerous Native Americans from Arizona fought for

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