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Naturals regions of Texas


Texas landscape
Texas landscape

Texas is the second largest state in the nation, after Alaska, and has an area of 695,622 sq km (268,581 sq mi), including 13,095 sq km (5,056 sq mi) of inland water and 1,046 sq km (404 sq mi) of coastal water over which it has jurisdiction. Extending for 1,240 km (770 mi) from east to west and for 1,290 km (800 mi) from north to south, the state comprises 7 percent of the land area of the United States. The mean elevation is 520 m (1,700 ft).

Texas can be divided into four natural regions, or physiographic provinces: the Gulf Coastal Plain, the Central Lowland, the Great Plains, and the Basin and Range province. The Gulf Coastal Plain, a subdivision of the Coastal Plain, makes up most of eastern and southern Texas and occupies more than one-third of the state. Near the coast this region is mostly flat and low-lying. It rises gradually to 300 m (1,000 ft) farther inland, where the land becomes more rolling. Belts of low hills cross the Gulf Coastal Plain in many areas. In these higher areas the stream valleys are deeper and sharper than those along the coast.

The Central Lowland


The Central Lowland, a subdivision of the Interior Plains, occupies much of north central Texas. The section of the Central Lowland in Texas is known as the Osage Plains. The land in this region has elevations ranging from 150 m (500 ft) in the east to 800 m (2,600 ft) on the western edge. Several belts of low hills cross the Central Lowland, running in a north-to-south direction.

The Great Plains


The Great Plains, also a subdivision of the Interior Plains, extends over most of northern and central Texas. The part of the Great Plains that occupies northern Texas, or the Panhandle, is called the High Plains. Another name for this area is Llano Estacado, or Staked Plain. The elevation of the High Plains ranges from 750 m (2,500 ft) to more than 1,200 m (4,000 ft). The land is flat, except for a few eroded river valleys.

The southern part of the Great Plains in Texas can be divided into the Edwards Plateau and the Central Texas section. The Edwards Plateau is generally level and differs from the rest of the Great Plains in that it is underlain with hard limestone, rather than with softer and more porous rock. The Central Texas section, which is hillier and rockier than the rest of the Great Plains in Texas, is often called the Hill Country. The eastern edge of the Edwards Plateau and of the Central Texas section is marked by the long ridge known as the Balcones Escarpment. It divides these regions from the lower Gulf Coastal Plain. Two small subdivisions of the Great Plains are seen in Texas, the Pecos Valley in the southwest and the Plains Border in the northeastern corner of the Panhandle.

The Pecos Valley


The Pecos Valley is mostly flat and rocky. The Plains Border is level or gently rolling. The Basin and Range province, a subdivision of the Intermontane Plateaus, lies to the west of the Great Plains in the extreme western part of Texas. Running through the central part of this region are several rugged mountain ranges. Between the mountain ridges and to the west of them are high dry basins or plateaus. The Basin and Range province in Texas is divided into two sections, the Mexican Highland and the Sacramento section. The Sacramento section has more extensive plateaus than the Mexican Highland, and contains the highest point in Texas, Guadalupe Peak, at 2,667 m (8,749 ft) above sea level. "Texas" © Emmanuel BUCHOT, Encarta, Wikipedia

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