The Moorefield Formation, or Moorefield Shale, is a geologic formation in northern Arkansas and eastern Oklahoma that dates to the Meramecian Series of the middle Mississippian. In Arkansas, this formation is generally recognized to have one member, the Ruddell Shale, in the upper Moorefield Formation.

Paleofauna Bryozoans Archimedes A. confertus A. proutanus Batostomella B. dubla B. parvula Tabulipora

Cephalopods Adnatoceras A. alaskense Bactrites B. caronarius B. smithianus Endolobus E. ornatus Girtyoceras G. welleri Goniaties Mitorthoceras

See also

List of fossiliferous stratigraphic units in Arkansas Paleontology in Arkansas

References