Cotter Formation
Stratigraphic range: Ordovician
TypeFormation
UnderliesPowell Formation
OverliesJefferson City Formation
Lithology
PrimaryDolomite
OtherChert, sandstone, shale
Location
RegionArkansas, Missouri, Oklahoma, Virginia
CountryUnited States
Type section
Named forCotter, Baxter County, Arkansas
Named byEdward Oscar Ulrich[1]

The Cotter Formation is a geologic formation in Arkansas,[2] Missouri,[3] Oklahoma[4] and in Virginia. It preserves fossils dating back to the Ordovician period.

See also

References

  1. ^ Purdue, A.H.; Miser, Hugh D. (1916). "Description of the Eureka Springs and Harrison quadrangles" (PDF). U.S. Geological Survey Geologic Atlas of the United States. 202: 4.
  2. ^ "Cotter Dolomite". Archived from the original on 2014-07-14. Retrieved 2014-07-11.
  3. ^ Thompson, Thomas L., 2001, Lexicon of Stratigraphic Nomenclature in Missouri, Missouri Department of Natural Resources, Division of Geology and Land Survey, Report of Investigation Number 73, p 72-3
  4. ^ McFarland, John David (2004) [1998]. "Stratigraphic summary of Arkansas" (PDF). Arkansas Geological Commission Information Circular. 36: 3–4. Archived from the original (PDF) on 2016-12-21. Retrieved 2018-01-10.


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