Smackover Formation

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Smackover Formation
Stratigraphic range: Oxfordian
Smackover Formation areal extent.png
Wells reporting Smackover Formation tops are indicated by a black point, and extend from Texas to Florida. Formation top depths measured in 6,764 wells range from 1,394 to 23,554 feet.
Type Formation
Underlies Buckner Formation
Overlies Norphlet Formation
Region Arkansas
Country United States

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.[1][2]

Mineral resources[edit]

Smackover Formation stratigraphic column for Texas

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.[3]

Smackover and Bossier Formations geologic cross section

See also[edit]


  1. ^ Dickinson, Kendell (1968). Upper Jurassic Stratigraphy of Some Adjacent Parts of Texas, Louisiana, and Arkansas. USGS. p. E9.
  2. ^ Chimene, Calvin (1976). Braunstein, Jules, ed. Upper Smackover Reservoirs, Walker Creek Field Area, Lafayette and Columbia Counties, Arkansas, in North American Oil and Gas Fields. Tulsa: The American Association of Petroleum Geologists. pp. 177–204. ISBN 0891813004.
  3. ^ Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 31 July 2014. Retrieved 8 July 2014.