Moorefield Formation

Moorefield Formation
Stratigraphic range: Mississippian
Type Formation
Sub-units Ruddell Shale
Underlies Batesville Formation
Overlies Boone Formation
Thickness up to 300 feet[1]
Lithology
Primary Shale
Other Limestone
Location
Region Arkansas, Oklahoma
Country United States
Type section
Named for Moorefield, Independence County, Arkansas
Named by George Irving Adams and Edward Oscar Ulrich[2]

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

A. confertus[3]
A. proutanus[3]
  • Batostomella
B. dubla[3]
B. parvula[3]

Cephalopods

A. alaskense[4]
  • Bactrites
B. caronarius[4]
B. smithianus[4]
E. ornatus[4]
  • Girtyoceras
G. welleri[4]

See also

References

  1. ↑ McFarland, John David (2004) [1998]. "Stratigraphic summary of Arkansas" (PDF). Arkansas Geological Commission Information Circular. 36: 11.
  2. ↑ Adams, G.; Ulrich, E. (1904). "Zinc and lead deposits of northern Arkansas". U.S. Geological Survey Professional Paper. 24: 26.
  3. 1 2 3 4 5 Horowitz, Alan S. (1977). "Late Mississippian and Early Pennsylvanian bryozoan faunas of Arkansas and Oklahoma: a review" (PDF). Oklahoma Geological Survey Guidebook. 18: 101–105. Retrieved 3 February 2018.
  4. 1 2 3 4 5 6 7 8 Gordon, Jr., Mackenzie (1964). "Carboniferous Cephalopods of Arkansas". U.S. Geological Survey Professional Paper. 460: 14–16.
  • Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 31 July 2014. Retrieved 8 July 2014.


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