The Mississippian period produced Barnett shale approximately 354 million years ago. This geological formation is located in the Bend Arch Basin in Texas and runs completely under the city of Fort Worth.

Some highly-respected experts would suggest that the Barnett Shale just might have the largest producible reserves of any onshore natural gas field in the continental United States. There's also some oil down around there.

The Barnett Shale is a geological structure located in the Bend Arch-Fort Worth Basin, Texas, USA. It consists of sedimentary rocks of Mississippian age.

Mississippian

Louisiana exports petroleum and coal products. The Port of South Louisiana, located on the Mississippi between New Orleans and Baton Rouge, is the largest volume shipping port in the Western Hemisphere and 4th largest in the world, as well as the largest bulk cargo port in the world.