Smackover Formation
The Smackover Formation is a geologic formation in Arkansas. It preserves fossils dating back to the Jurassic period. The Smackover Formation consists of oolitic limestones and silty limestones. Mineral resources. The Smackover Formation has been a prolific source of petroleum. The 1922 discovery of the Smackover oil field, after which the Smackover Formation is named, resulted in a sizeable oil boom in southern Arkansas. In addition to being a petroleum reservoir, as of 2015, the brine from the Smackover Formation is the only source of commercial bromine in the United States.