Introduction:
Texas (IPA: /ˈtɛk.səs/) is a state located in the southern and southwestern regions of the United States of America. With an area of and a population of 23.5 million in 254 counties, the state is second-largest in both area, behind Alaska, and population, behind California. About half the state's population resides in either the Dallas–Fort Worth or Houston metropolitan areas.

The state's name derives from a word in the Caddoan language of the Hasinai, , "Friend". Texas declared its independence from Mexico in 1836 and existed as the independent Republic of Texas for nearly a decade. In 1845, it joined the United States as the 28th state.

Texas is internationally known for its energy and aeronautics industries, and for the ship channel at the Port of Houston—the largest in the U.S. in international commerce and the sixth-largest port in the world. The state is home to the most Fortune 500 companies in the United States and has the second-largest economy in the United States. The Texas Medical Center contains the world's largest concentration of research and healthcare institutions.



Capital: Austin

Geography: The geography of Texas spans a wide range of features and timelines. Texas is the southernmost part of the Great Plains, which ends in the south against the folded Sierra Madre Oriental of Mexico. It is in the south-central part of the United States of America. It is considered to form part of the U.S. South and also part of the U.S. Southwest.

The Rio Grande, Red River and Sabine River all provide natural state lines where Texas borders Oklahoma on the north, Louisiana and Arkansas on the east, and New Mexico and the Mexican states of Chihuahua, Coahuila, Nuevo León, and Tamaulipas to the south.

By residents, the state is generally divided into North Texas, East Texas, Central Texas, South Texas, and West Texas, but according to the Texas Almanac, Texas has four major physical regions: Gulf Coastal Plains, Interior Lowlands, Great Plains, and The Basin and Range Province. This is the difference between human geography and physical geography.

Some regions of Texas are associated with the South more than with the Southwest (primarily East Texas, Central Texas, and North Texas), while other regions share more similarities with the Southwest (primarily far West Texas and South Texas). The upper Texas Panhandle and the South Plains parts of West Texas do not easily fit into either category. The former has much in common with the Midwestern United States, while the latter, originally settled primarily by anglo Southerners, yet with a notable Hispanic population, is somewhat of a blend of South and Southwest.

The size of Texas prohibits easy categorization of the entire state wholly in any recognized region of the United States; geographic, economic, and even cultural diversity between regions of the state preclude treating Texas as a region in its own right.

Geology

Texas is the southernmost part of the Great Plains, which ends in the south against the folded Sierra Madre Occidental of Mexico. The continental crust here is a stable Mesoproterozoic craton which changes across a broad continental margin and transitional crust into true oceanic crust of the Gulf of Mexico. The oldest rocks in Texas date from the Mesoproterozoic and are about 1,600 million years old. These Precambrian igneous and metamorphic rocks underly most of the state, and are exposed in three places: Llano uplift, Van Horn, and the Franklin Mountains, near El Paso. This is overlain by mostly sedimentary rocks. The oldest sediments were deposited on the flanks of a rifted continental margin, or passive margin that developed during Cambrian time. This margin existed until Laurasia and Godwana collided in Pennsylvanian time to form Pangea. This is the buried crest of the Appalachian Mountains—Ouachita Mountains—Marathon Mountains zone of Pennsylvanian continental collision. This orogenic crest is today buried beneath the Dallas—Waco—Austin—San Antonio trend. During this time E. Texas was a region of high mountains and shallow seas covered W. Texas.

The late Paleozoic mountains collapsed as rifting in Jurassic time began to open the Gulf of Mexico. Pangea began to break up in the Triassic but seafloor spreading to form the Gulf of Mexico occurred only in the mid and late Jurassic. The shoreline shifted again to the eastern margin of the state and the Gulf of Mexico continental shelf began to build out. Today there are to of sediments buried beneath the Texas continental shelf and a large proportion of remaining US Oil reserves are to be found here. At the start of its formation, the incipient Gulf of Mexico basin was restricted and seawater often evaporated completely to form thick evaporite deposits of Jurassic age. These salt deposits have buoyantly risen up through the passive margin sediments to form salt diapirs, which are very common in East Texas and along the Gulf coast and offshore.

East Texas outcrops consist of Cretaceous and Paleogene sediments. These sediments contain important deposits of Eocenelignite which are increasingly used for generating electricity. Oil is found in the Mississippian ad Pennsylvanian sediments in the north, Permian sediments in the west, Cretaceous sediments in the east, and along the Gulf coast and out on the Texas continental shelf. Oligocene volcanic rocks are found in far west Texas, in the Big Bend area. A blanket of Miocene sediments known as the Ogallala formation in the western high plains region is an important aquifer. Texas has no active or dormant volcanoes and few earthquakes, being situated far from an active plate tectonic boundary. (The Big Bend area is the most seismically active; however, the area is sparsely populated and suffers minimal damages and injuries, and no known fatalities have been attributed to a Texas earthquake.)



Economy - overview:
In 2006, Texas had a gross state product of $1.0856 trillion, the second highest in the U.S. after California, after recently surpassing New York state. Gross state product per capita as of 2005 was $42,975. Texas leads the nation in number of beef, which usually exceed 16 million head. Cotton is the leading crop and the state's second-most-valuable farm product. Texas also leads in national production of grain sorghum, watermelons, cabbages, and spinach. Wheat, corn, and other grains are also important.

Texas's growth is often attributed to the availability of jobs, the low cost of housing (housing values in the Dallas, Houston, and San Antonio areas, while generally rising, have not risen at the astronomical rates of other cities such as San Francisco), the lack of a personal state income tax, low taxation and limited regulation of business, a geographic location in the center of the country, limited government (the Texas Legislature meets only once every two years), favorable climate in many areas of the state, and vast, plentiful supplies of oil and natural gas. The known petroleum deposits of Texas are about 8 billion barrels, which makes up approximately one-third of the known U. S. supply. Texas has 4.6 billion barrels of proven crude oil reserves. There are currently 33 billionaires residing in Texas today. Dallas has 11 billionaires, the most of any city in Texas.

Texas remained largely rural until World War II, with cattle ranching, oil, and agriculture as its main industries. Cattle ranching (though important) was never Texas's chief industry – before the oil boom back to the period of the first Anglo settlers, the chief industry was cotton farming (as in most of the South).

In 1926, San Antonio had over 120,000 people, the largest population of any city in Texas. After World War II, Texas became increasingly industrialized. Its economy today relies largely on information technology, oil and natural gas, fuel processing, electric power, agriculture, and manufacturing. The major segment of the economy depends largely on the region involved – for example, the timber industry is a major portion of the East Texas economy but a non-factor elsewhere, while aerospace and defense manufacturing is primarily centered within the Dallas-Fort Worth Metroplex.

The state has two major economic centers: Dallas and Houston. Houston stands at the center of the petrochemical, biomedical research trades, and aerospace (particularly NASA) while Dallas functions as the center of the defense manufacturing and information technology labor market in Texas.

As of 2006, Texas, for the first time, has more Fortune 500 company headquarters (56) than any other state (California has 55; ironically, it was due to the move of Fluor Corp. from California to Texas). This has been attributed to both the growth in population in Texas and the rise of oil prices in 2005, which resulted in the growth in revenues of many Texas oil drilling and processing companies.

In 2006, for the fifth year in a row, Texas was ranked as the number one state by export revenues. Texas exports for 2006 totaled $150.8 billion, which is $22.1 billion more than 2005 and represents a 17.2 percent increase. In 2002, the Port of Houston was 6th among the top sea ports in the world in terms of total cargo volume; Air Cargo World rated Dallas-Fort Worth International Airport as "the best air cargo airport in the world".

Texans pride themselves in a history of tradition, yet they seek new social and technological developments also. Round Rock (an Austin suburb) is the headquarters of Dell and the surrounding area is known as "Silicon Hills". Dallas is a famously cosmopolitan metropolis and the birthplace of the integrated circuit, and Houston is a global leader in the energy industry. The cultures of San Antonio and El Paso retain their Mexican heritage while Fort Worth maintains its western heritage. With a nod to its diversity and its past as a sovereign nation, the state tourism slogan is "Texas: It's like a whole other country."

Texas is one of the top filmmaking states in the United States, just after California and New York. Austin, Texas is now one of the leading filmmaking locations in the country. In the past 10 years alone (1995-2004), more than $2.75 billion has been spent in Texas for film and television production.The Texas Film Commission was founded for free services to filmmakers, from location research to traveling.

Since 2003, Texas state officials have been committed to developing the economy of Texas with various initiatives such as the Texas Enterprise Fund and the Texas Emerging Technology Fund, which invest money into developing Texas business.