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Araucarioxylon arizonicum (alternatively Agathoxylon arizonicum) is an extinct species of conifer that is the state fossil of Arizona. [1] The species is known from massive tree trunks that weather out of the Chinle Formation in desert badlands of northern Arizona and adjacent New Mexico, most notably in the 378.51 square kilometres (93,530 acres) Petrified Forest National Park. [2]
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.
Parts of Arizona located in the Sonoran Desert have warm daytime temperatures year round, while other parts of the state experience seasonal coldness regularly. The average daily temperatures of Yuma, which is located near Arizona's southwestern corner, range from 43 to 67 °F (6 to 19 °C) in January, and from 81 to 107 °F (27 to 42 °C) in July.
Home to the Grand Canyon and mountainous pine forests in the north, and cactus-filled deserts in the south, Arizona has a varied natural landscape unlike any other state. Yet as tough and rugged ...
This is a landscape of steep mountains and high stony plateaus with rocky outcrops from the Kaibab Plateau in northern Arizona south to the Mogollon Plateau, extending eastwards into southwestern New Mexico and into the Trans-Pecos region of West Texas. Elevations range from 1,370 to 3,000 meters (4,490 to 9,840 ft), with some peaks higher than ...
The Summary. Increasingly frequent and severe heat waves in the Southwest are damaging some desert plants known for thriving in harsh conditions.
Arbutus arizonica, commonly known as Arizona madrone, is a tree species in the heath family that is native to the southwestern United States and northwestern Mexico.Its range extends along the Sierra Madre Occidental cordillera from the Madrean Sky Islands of southeastern Arizona and southwestern New Mexico [3] south as far as Jalisco.
The project was ultimately successful and helped produce more than 800,000 photos of enemy airfields and nuclear weapons sites. CORONA ended after 12 years in 1972, but many of the concrete ...