USA TODAY | USGS: Largest oil deposit ever found in US discovered in Texas USA TODAY The U.S. Geological Survey recently discovered the largest continuous oil and gas deposit ever found in the United States, officials said Tuesday. The agency announced that the Wolfcamp shale, located in the Midland Basin portion of Texas' Permian ... USGS Announces Its Largest Oil And Gas Discovery Ever In The States There's oil in them thar flatlands: Report puts a massive number on West Texas shale formation Largest US oil and gas discovery made - USGS |