Colorado Plateau


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Colorado Plateau,

physiographic region of SW North America, c.150,000 sq mi (388,500 sq km), in Arizona, Utah, Colorado, and New Mexico, including the "Four Corners" area. It is characterized by broad plateaus, ancient volcanic mountains at elevations of c.5,000 to 13,000 ft (1,520–3,960 m), and deeply dissected canyons lined with often brightly colored sedimentary and volcanic rocks, including the Grand CanyonGrand Canyon,
great gorge of the Colorado River, one of the natural wonders of the world; c.1 mi (1.6 km) deep, from 4 to 18 mi (6.4–29 km) wide, and 217 mi (349 km) long, NW Ariz.
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 of the Colorado River. Native American reservations occupy about one third of the mostly semiarid and sparsely vegetated area, which was the last U.S. region to be explored by whites. About one half of the public land is used for grazing. Among many ancient cliff dwellings are those at Mesa Verde and Canyon de Chelly. The region has a number of U.S. national parks and monuments.

Bibliography

See K. A. Brown, Four Corners (1996).

Colorado Plateau

 

a plateau in the Cordilleras of North America, located in the southwestern part of the USA. Borders on the northwest with the Great Basin, on the east and northeast with the Rocky Mountains, and on the south with the interior region of the Mexican Plateau. Area, more than 300,000 sq km. Predominating elevations, 1,800–2,500 m; highest point, 3,861 m (Humphreys Peak).

The plateau is formed of Precambrian crystalline rocks, covered with a heavy sedimentary layer from the Paleozoic to the Paleogene periods, with which are linked deposits of uranium and vanadium ores. During the Paleogene and Neocene uplifting occurred, accompanied by faulting movements and manifestations of volcanic activity and erosion caused by rivers (especially magnificent is the canyon of the Colorado River, the Grand Canyon). The climate is subtropical continental and dry (with annual precipitation of 200–500 mm). Vegetation consists of arid steppes with succulents and, in less arid places, forests of twisted pines and juniper.

References in periodicals archive ?
Though Bison were not overly common, such as observed on the Plains, the fossil record clearly demonstrates that this iconic bovid played a role in the biotic communities over much, if not all, of the Colorado Plateau up to the time of European contact.
In between, rivers may have drained off the Colorado Plateau to the north, through Idaho and beyond.
Film lovers and environmental activists can also look forward to watching Colors of the Deserts: The Red Colorado Plateau, The Man Who Stopped the Desert, Colors of the Deserts: The White Uyuni and Colors of the Deserts-The Yellow Sahara which will be screened on Thursday, 26 September.
In addition, the Company will cease mining at the Pandora property on the Colorado Plateau during the second quarter of FY 2013, pending the depletion of its identified uranium and vanadium resources.
Conference of Research on the Colorado Plateau (9th: 2007: Northern Arizona University) Ed.
Carved into the rocks of the Colorado Plateau, the Grand Canyon is 18 miles wide and a mile deep.
The southwestern turkeys, on the other hand, "were raised by the Ancestral Puebloans who lived on the Colorado Plateau, around the Four Corners region of the southwest United States," Speller said.
The company president and chief executive officer, George Glasier, said, 'We are happy to see the confidence shown in the Energy Fuels management team by the shareholders of Magnum, as we complete another milestone in the consolidation of Colorado Plateau uranium assets.
Uplift of the Colorado Plateau and deformation of strata in the canyon section (faulting and folding) occurred as the floodwaters receded and before sediment solidified into rock.
Nearly two billion years of the Earth's history have been exposed as the Colorado River and its tributaries cut their channels through layer after layer of rock while the Colorado Plateau was uplifted.
mucosissima was isolated and identified in 2007 by Reddy and Garcia-Pichel from biologic soil crust samples collected from sandy arid soil in the US Colorado Plateau (5).
While WITH PICKS, SHOVELS AND HOPE: THE CCC AND ITS LEGACY ON THE COLORADO PLATEAU will likely be a top pick for Colorado libraries, any interested in public lands management, Depression-era history, or the Civilian Conservation Corps will find this a key historical guide.

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