juan amaya texas oil By rmulli1 Jun 16, 1899 first major refinery http://www.texasalmanac.com/topics/business/history-oil-discoveries-texas Jan 10, 1901 soindletop http://www.priweb.org/ed/pgws/history/spindletop/spindletop.html Jun 16, 1923 discovery ,santa rita no.1 http://www.texasalmanac.com/topics/business/history-oil-discoveries-texas Aug 17, 1931 Gov. Ross S. Sterling ordered the National Guard into the field, which he placed under martial law. Jun 19, 1945 he prolific Levelland Field, in Cochran and Hockley counties, was discovered