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.
| 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] |
Paleofauna edit
Bryozoans edit
Cephalopods edit
- A. alaskense[4]
- E. ornatus[4]
- G. welleri[4]
See also edit
References edit
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.
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