| 单词 | badlands | ||||||
| 释义 | badlandsBad·landsalso Bad Lands B0022200 (băd′lăndz′)bad·landsB0022200 (băd′lăndz′)badlands(ˈbædˌlændz)bad•lands(ˈbædˌlændz)n.pl. bad·lands(băd′lăndz′)badlands
badlandsnounbadlandsSee also: National Parks and Monuments (table)National Parks and Monuments badlands,area of severe erosion, usually found in semiarid climates and characterized by countless gullies, steep ridges, and sparse vegetation. Badland topography is formed on poorly cemented sediments that have few deep-rooted plants because short, heavy showers sweep away surface soil and small plants. Depressions gradually deepen into gullies. The term badlands was first applied to the arid, dissected plateau region of SW South Dakota by Native Americans and fur trappers who found the area difficult to cross. South Dakota's Big Badlands, also known as the Badlands of the White River, are the world's best and most extensive (c.2,000 sq mi/5,180 sq km) example of this topography. Gullies have cut as deep as 500 ft (152 m) below the plateau's surface, and differences in rock type have created colorful and spectacular formations. The Big Badlands are famous for fossils of prehistoric animals. Badlands National Park, 242,756 acres (98,316 hectares), (authorized as a national monument in 1929, designated a national park in 1978) occupies most of the region. The park is noted for its scenery, its fossils of prehistoric animals, and its varied wildlife, including bison, bighorn sheep, deer, antelope, and prairie dogs. See National Parks and MonumentsNational Parks and MonumentsNational Parks Name Type1 Location Year authorized Size acres (hectares) Description Acadia NP SE Maine 1919 48,419 (19,603) Mountain and coast scenery. ..... Click the link for more information. (table). Badlandssharply and complexly disjointed low mountainous relief which is difficult to travel through and unsuitable for agriculture. Badlands consist of an intricate set of branching gullies and the narrow ridges which divide them. They originate primarily in regions with a dry climate, especially where there are water-resistant clayey soils as a result of washing out by temporary (torrential) floods. They are widespread in most mountainous desert and semidesert areas of the world. As a result of irrational utilization of land and cutting down of mountain forests, badlands also arise in steppe and forest-steppe zones. The classical badlands developed in the eastern foothills of the Rocky Mountains in North America. In the USSR they are confined to the desert piedmont areas of Middle Asia, as well as Kazakhstan. badlands[′bad‚lanz]badlands
Synonyms for badlands
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badlands - deeply eroded barren land 
Badlands - an eroded and barren region in southwestern South Dakota and northwestern Nebraska