Arizona Cet État du sud-ouest des États-Unis, n'a pas d'ouverture sur la mer. Il est limité à l'ouest par la Californie et le Nevada, au nord par l'Utah, à l'est par le Nouveau-Mexique et au sud par le Mexique avec lequel il a une frontière commune de près de 600 km. Il couvre 295.022 km² pour 3.700.000 h. Sa capitale est Phoenix (1.050 000 h.). La partie nord de l'État est occupée par le haut plateau du Colorado, dont l'altitude moyenne varie de 1400 à 3000 m. Les terres du Sud, limitrophes du Mexique, sont également montagneuses. Entre ces deux zones de relief, le Gila, affluent du Colorado, occupe une dépression orientée vers l'ouest : c'est là que se trouve concentrée la majeure partie de la population. En général, les cours d'eau ont eu du mal à se frayer une voie à travers les montagnes. Le Colorado, qui est le principal fleuve de l'Arizona, entaille le plateau du Nord sur près de 2 000 m de profondeur au Grand Canyon. À l'exception des montagnes enneigées, le climat est marqué par l'aridité et la luminosité. Yuma a la plus faible pluviosité des États-Unis (90 mm de pluies par an, moins que certaines stations sahariennes), et Phoenix le plus fort ensoleillement (3700 heures par an). Les plaines ont une végétation de garrigue, de steppe à armoise ou de semi-désert (désert de Sonora). Les parois verticales dépourvues de sol et de végétation exhibent leurs couleurs vives (désert Peint) et leurs formes de tours, murailles, pinacles, clochetons (vallée des Monuments, Grand Canyon). Seuls le Colorado et ses principaux affluents alimentés par la fonte des neiges ont un écoulement permanent. Canyon de Chelly Arizona - Grand Canyon Arizona - Lake Mead Arizona - Petrified Forest - Saguaro Arizona USA  Arizona

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Canyon De Chelly Chinle, Arizona Casa Grande Ruins Coolidge, Arizona Chiricahua Willcox, Arizona Coronado National Memorial Hereford, Arizona Fort Bowie National Historic Site Willcox, Arizona Glen Canyon National Glen Canyon, Arizona Grand Canyon National Park Grand Canyon, Arizona Hohokam Pima Coolidge, Arizona Hubbell Trading Post National Ganado, Arizona Lake Mead the Mojave Desert, Arizona Montezuma Castle Camp Verde, Arizona Navajo National Monument Black Mesa, Arizona Organ Pipe Cactus Ajo, Arizona Parashant National Monument Northern Arizona, Petrified Forest National Park Petrified Forest National Park, Pipe Spring National Monument Fredonia, Arizona Saguaro National Park Tucson, Arizona Sunset Crater Volcano Flagstaff, Arizona Tonto National Monument Roosevelt, Arizona Tumacácori National Park Tumacácori, Arizona Tuzigoot National Monument Clarkdale, Arizona Walnut Canyon Flagstaff, Arizona Wupatki National Monument Flagstaff, Arizona