Fort Payne Formation

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The Fort Payne Formation, or Ft. Payne Formation is a geologic formation located in the southeast part of the United States. It is a Mississippian cherty limestone that overlies the Chattanooga Shale and underlies the St. Louis Limestone. In areas it transitions into the siltstone Borden Formation to the north. The Fort Payne Formation is named for Fort Payne, Alabama where it appears.