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Allegheny Plateau

(Encyclopedia)Allegheny Plateau, dissected plateau, western part of the Appalachian Mts., extending c.500 mi (800 km) SW from N Pa. to SW Va., rising to c.4,860 ft (1,480 m) at Spruce Knob, the highest peak in West...

Allegheny

(Encyclopedia)Allegheny ălˈəgāˌnē, ălˈəgäˌnē [key], river, 325 mi (523 km) long, rising in N central Pa., and flowing NW into N.Y., then SW through Pa. to the Monongahela, with which it forms the Ohio R...

plateau

(Encyclopedia)plateau, elevated, level or nearly level portion of the earth's surface, larger in summit area than a mountain and bounded on at least one side by steep slopes, occurring on land or in oceans. Some pl...

Cumberland Plateau

(Encyclopedia)Cumberland Plateau or Cumberland Mountains, southwestern division of the Appalachian Mt. system, extending northeast to southwest through parts of West Virginia, Virginia, Kentucky, and Tennessee into...

Colorado Plateau

(Encyclopedia)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 b...

Columbia Plateau

(Encyclopedia)Columbia Plateau, physiographic region of North America, c.100,000 sq mi (259,000 sq km), NW United States, between the Rocky Mts. and the Cascade Range in Washington, Oregon, and Idaho. Most of the p...

Jos Plateau

(Encyclopedia)Jos Plateau jôs [key], region, c.3,000 sq mi (7,770 sq km), alt. c.4,200 ft (1,280 m), central Nigeria, W Africa. The plateau, composed mainly of granite, slopes gently to the north and is covered by...

Mogollon Plateau

(Encyclopedia)Mogollon Plateau or Mogollon Mesa mōgōyōnˈ [key], tableland, part of the Colorado Plateau, from 7,000 to 8,000 ft (2,134–2,438 m) high, E central Ariz. It is covered by pine forests, parts of wh...

Laurentian Plateau

(Encyclopedia)Laurentian Plateau, Canada: see Canadian Shield. ...

Bié Plateau

(Encyclopedia)Bié Plateau or Bihé Plateau both: byĕ [key], highland region, western section of the central plateau of Angola, SW Africa; alt. 5,000 to 6,000 ft (1,520–1,830 m). Its cool climate and ample rainf...