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Llano Estacado(lä`nō ĕstəkä`dō) or
Staked Plain,level, semiarid, plateaulike region of the S Great Plains, c.40,000 sq mi (103,600 sq km), E N.Mex. and W Tex., between the Pecos River and the Cap Rock escarpment. The High Plains of the Texas Panhandle (c.4,000 ft/1,220 m high), centered around Amarillo, are usually distinguished from the somewhat lower South Plains (c.2,500 ft/760 m), centered around Lubbock, Tex. Both are windswept grasslands. Formerly used for cattle ranching, the plains are dotted with dryland and irrigated farms as well as oil and natural-gas fields.
a plateau in the southern part of the Great Plains in the USA, with a level surface that is not very rugged. Elevation, 700-1,500 m. It is composed mainly of sandstones and limestones and is covered with unfixed sand in some places. There are karst landscapes. The Pecos River is the only permanent watercourse. The region is characterized by semidesert vegetation.