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State in southwestern USA, one of the
Great Plains states, bordered to the east by
Louisiana (partly along the Sabine River), to the northeast by
Arkansas, to the north by
Oklahoma (part of this boundary being along the
Red River), to the west by
New Mexico, to the southwest by the
Rio Grande River and Mexico, and to the southeast by the Gulf of Mexico; area 678,051 sq km/261,797 sq mi; population (2000) 20,851,800; capital
Austin. Texas's nickname derives from the state flag's single star. The landscape of Texas varies, with the Great Plains in the north, the Basin and Range region in the west, and the Coastal Plain region and the Gulf of Mexico in the south. Huge inland seas created much of the bedrock of present-day Texas, and the state's sedimentary rocks contain many fossils and are rich in oil reserves. Texas produces nearly one-third of US petroleum. Chemicals, petrochemicals, cotton, sorghum, wheat, and livestock are among the state's chief economic products. Despite the vast rural landscape, over 80% of the Texas population resides in urban areas. The
Dallas-
Forth Worth Consolidated Metropolitan Area is the state's most populous; other cities include
Houston,
San Antonio, and
El Paso. Originally home to the
Apache, Comanche, and Karankawa peoples, Texas was settled by the Spanish in the 16th and 17th centuries. Texas was part of Mexico 182136, after which it became an independent republic. Texas was admitted to the Union in 1845 as the 28th US state. The annexation of Texas was one of the causes of the
Mexican War (184648).
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