The Fayetteville Shale is known to be Late Mississippian-Chesterian in age, the same age as the Barnett Shale in Fort Worth Basin, ranging in thickness from 50 to 550 feet and from 1,500 to 6,500 feet. Producers say that even with the experience of hydraulic fracturing in the Barnett shale play, the Fayetteville Shale requires first-rate geological knowledge for successful development.