Abstract

Part of a U.S. Geological Survey regional geohydrologic study. Rocks equivalent to the Werner, Louann Norphlet, Smackover, Haynesville, and Cotton Valley sequences of Mississippi and Arkansas and, except for the Werner equivalent, are extended into panhandle Florida. The predominantly fluvial sequence was interrupted at least twice by barred-basin conditions that resulted in the deposition of extensive evaporite deposits, and at least once, during deposition of the Smackover Formation, by a major marine transgression. The updip limits and isopach map trends of the Jurassic units mapped appear to have been controlled by a major northwest-trending, right-lateral wrench fault.--Modified journal abstract.

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