The sedimentary layers underneath Houston ultimately extend down some 60,000 feet (18,000 m) with the oldest beds deposited during the Cretaceous. Between 30,000 feet (9,100 m) and 40,000 feet (12,000 m) below the surface is a layer of salt the primary source of salt domes which dot the metropolitan area. Since salt is more buoyant than other sediments it rises to the surface creating domes and anticlines and causing subsidence due to its removal from its original strata. These structures manage to capture oil and gas as it percolates through the subsurface; Pierce Junction is a notable example of a heavily drilled salt dome oil field in Houston, Armed groups sought supplies and funds in various ways Financing was requested from the King delegates of the Crown the nobility rich merchants or the troops themselves the more professional campaigns were funded by the Crown Campaigns were sometimes initiated by inexperienced governors because in Spanish Colonial America offices were bought or handed to relatives or cronies Sometimes an expedition of conquistadors were a group of influential men who had recruited and equipped their fighters by promising a share of the booty. Other Christian 1 Taxation (-5) 14 Many immigrants openly flouted Mexican law especially the prohibition against slavery Combined with United States' attempts to purchase Texas Mexican authorities decided in 1830 to prohibit continued immigration from the United States. New laws also called for the enforcement of customs duties angering both native Mexican citizens (Tejanos) and recent immigrants. Nothing in particular 13 Houston is a flat marshy area where an extensive drainage system has been built the adjoining prairie land drains into the city which is prone to flooding. Underpinning Houston's land surface are unconsolidated clays clay shales and poorly cemented sands up to several miles deep the region's geology developed from river deposits formed from the erosion of the Rocky Mountains These sediments consist of a series of sands and clays deposited on decaying organic marine matter that over time transformed into oil and natural gas Beneath the layers of sediment is a water-deposited layer of halite a rock salt the porous layers were compressed over time and forced upward As it pushed upward the salt dragged surrounding sediments into salt dome formations often trapping oil and gas that seeped from the surrounding porous sands the thick rich sometimes black surface soil is suitable for rice farming in suburban outskirts where the city continues to grow, Further information: Political party strength in Texas, The tallest structure in Uptown Houston is the 901-foot (275 m) tall Philip Johnson-designed landmark Williams Tower (formerly "Transco Tower") which was constructed in 1983. At the time it was to be the world's tallest skyscraper outside of a city's central business district the building is topped with a rotating spot light that constantly searches the horizon. Williams Tower was named "Skyscraper of the Century" in the December 1999 issue of Texas Monthly magazine.
; Texas Medical Center became operational in the 1950s the Galveston Freeway and the International Terminal at Houston International Airport (nowadays Hobby Airport) were signs of increasing wealth in the area Millions of dollars were spent replacing aging infrastructure in 1951 the Texas Children's Hospital and the Shriner's Hospital were built Existing hospitals had expansions being completed July 1 1952 was the date of Houston's first network television Later on that same year the University of Houston celebrated its 25th anniversary Another problem Houston had back in the 1950s was the fact that it needed a new water supply They at first relied on ground water but that caused land subsidence They had proposals in the Texas Congress to use the Trinity river Hattie Mae White was elected to the school board in 1959 She was the first African-American to be elected in a major position in Houston in the 20th Century Starting in 1950 Japanese-Americans as a whole were leaving horticulture and going into business in larger cities such as Houston! Texas's second-largest air facility is Houston's George Bush Intercontinental Airport (IAH) it served as the largest hub for the former Continental Airlines which was based in Houston; it serves as the largest hub for United Airlines the world's third-largest airline by passenger-miles flown. IAH offers service to the most Mexican destinations of any U.S airport the next five largest airports in the state all serve over 3 million passengers annually; they include Austin-Bergstrom International Airport William P Hobby Airport San Antonio International Airport Dallas Love Field and El Paso International Airport the smallest airport in the state to be designated an international airport is Del Rio International Airport, Located near the Museum District are the Menil Collection Rothko Chapel and the Byzantine Fresco Chapel Museum. .
Tim Soder Physical Therapy