The Barnett Shale is a geological formation located in north-central Texas, primarily in the Fort Worth Basin. It is known for its rich deposits of natural gas, making it a significant source of energy in the United States. The shale formation is approximately 5,000 to 7,000 feet deep and spans several counties, including Tarrant County and Denton County. Discovered in the 1980s, the Barnett Shale became a focal point for natural gas extraction through techniques like hydraulic fracturing, or fracking. This process has allowed energy companies to access previously unreachable gas reserves, contributing to the growth of the natural gas industry and impacting local economies.