Joachim Dolomite

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Joachim Dolomite
Stratigraphic range: Ordovician
St Peters Sandstone Pacific MO 5-med.jpg
Joachim Dolomite over St. Peter Sandstone (Pacific, Missouri)
Type Formation
Unit of Ancell Group
Underlies Pecatonica Formation and Plattin Limestone
Overlies St. Peter Sandstone
Thickness0 to 100+ feet in Arkansas [1]
Lithology
Primary dolomite
Location
Region Arkansas, Illinois, Missouri
Country United States
Type section
Named for Joachim Creek, Jefferson County, Missouri
Named byArthur Winslow [2]

The Joachim Dolomite is a Middle Ordovician geologic formation in Arkansas, Illinois, and Missouri. [1] The name was first introduced in 1894 by Arthur Winslow in his study of the geology of Missouri. [2] Winslow designated a stratotype along Plattin Creek, which was misidentified as Joachim Creek, in Jefferson County. [3] The name was introduced into Arkansas in 1911, replacing part of the, now abandoned, Izard Limestone. [4]

See also

References

  1. 1 2 McFarland, John David (2004) [1998]. "Stratigraphic summary of Arkansas" (PDF). Arkansas Geological Commission Information Circular. 36: 5. Archived from the original (PDF) on 2016-12-21. Retrieved 2018-01-10.
  2. 1 2 Winslow, A. (1894). "Lead and zinc deposits, section 1". Geological Survey of Missouri. 6: 331, 352–353.
  3. ↑ Grohskopf, John G. (1948). "Zones of Plattin-Joachim of eastern Missouri". Bulletin of the American Association of Petroleum Geologists. 332 (3): 351–365.
  4. ↑ Ulrich, E.O. (1911). "Revision of the Paleozoic systems". Bulletin of the Geological Society of America. 22: 281–680.


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