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The Pine Prairie salt dome is a characteristic Gulf Coast salt dome, and is composed of a steep-sided, relatively flat-topped, pluglike salt core surmounted by a thimble-like cap of limestone and gypsum-anhydrite. The salt core is 1 mile in diameter and rises to within 520 feet of the surface. The limestone of the cap is exposed at the surface. The salt core and cap have been intruded into beds of Oligocene to Pliocene age. Commercial production has never been established. Four small producers were completed at a depth of about 1,300 feet on the west edge of the dome. Three later well located deep tests respectively on the northeast, southeast, and southwest sides of the dome were dry.

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