| has gloss | eng: Petroleum in the United States has been a major industry since shortly after the oil discovery at Oil Creek, Pennsylvania in 1859. As of 2008, the US was the world's third-largest oil producer (after Saudi Arabia and Russia), producing 8.5 million barrels of oil and natural gas liquids per day. The leading oil-producing area in the US in 2008 was the federal zone of the Gulf of Mexico, which produced 1.15 million barrels per day, followed by Texas (1.09 million barrels per day), Alaska (0.68 million barrels per day) and California (0.59 million barrels per day). |
