Moorefield Formation

Moorefield Formation
Stratigraphic range: Mississippian
TypeFormation
Sub-unitsRuddell Shale
UnderliesBatesville Formation
OverliesBoone Formation
Thicknessup to 300 feet[1]
Lithology
PrimaryShale
OtherLimestone
Location
RegionArkansas, Oklahoma
CountryUnited States
Type section
Named forMoorefield, Independence County, Arkansas
Named byGeorge 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]
B. dubla[3]
B. parvula[3]

Cephalopods

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

See also

References

  1. ^ McFarland, John David (2004) [1998]. "Stratigraphic summary of Arkansas" (PDF). Arkansas Geological Commission Information Circular. 36: 11. Archived from the original (PDF) on 2016-12-21. Retrieved 2018-06-01.
  2. ^ Adams, G.; Ulrich, E. (1904). "Zinc and lead deposits of northern Arkansas". U.S. Geological Survey Professional Paper. 24 (7): 26. Bibcode:1904JG.....12..663.. doi:10.1086/621186.
  3. ^ a b c d e 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. ^ a b c d e f g h Gordon, Mackenzie Jr. (1964). "Carboniferous Cephalopods of Arkansas". U.S. Geological Survey Professional Paper. 460: 14–16.


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