Council Grove Group

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Council Grove Group
Stratigraphic range: Carboniferous-Permian boundary[1]
TypeGroup
Sub-unitsSpeiser Shale
Location
RegionMidcontinent (Kansas, Nebraska, Oklahoma, Colorado (subsurface) )
CountryUnited States
Type section
Named forCouncil Grove, Kansas

The Council Grove Group is a geologic group in Kansas, Oklahoma, and Nebraska as well as subsurface Colorado. It preserves fossils dating to the Carboniferous-Permian boundary.[1][2] This group forms the foundations and lower ranges of the Flint Hills of Kansas, underlying the Chase Group that forms the highest ridges of the Flint Hills.

With the exposure of the group's lower formations in the 1993 flooding,[3] the entirety of the Council Grove Group, from hillcrest Speiser Shale down to pond-level Americus limestone, is exposed for study from top to bottom in the Tuttle Creek Lake Spillway.[4]

See also[]

References[]

  1. ^ Jump up to: a b Robert S. Sawin, Ronald R. West, Evan K. Franseen, W. Lynn Watney (January 2006). "Carboniferous-Permian Boundary in Kansas, Midcontinent, U.S.A". Current Research in Earth Sciences (252(1)). ... the Carboniferous-Permian boundary in Kansas can now be confidently defined. Based [on fossil changes, the] boundary in Kansas can be placed at the base of the Bennett Shale Member of the Red Eagle Limestone.CS1 maint: multiple names: authors list (link)
  2. ^ "Geologic Unit: Council Grove". National Geologic Database. Geolex — Unit Summary. United States Geological Survey. Retrieved 2019-06-02.
  3. ^ David Mathews, Vlad G. Perlea, Francke C. Walberg, Douglas R. Anderson (U.S. Army Corps of Engineers, Kansas City, Missouri) (1998). "Erosion and Repair of Unlined Spillway Chute Excavated in Rock". International Conference on Case Histories in Geotechnical Engineering. Missouri University of Science and Technology. Retrieved 2019-06-01.CS1 maint: multiple names: authors list (link)
  4. ^ "Pottawatomie County T. 9 S., R. 8 E." Kansas Geological Survey. Retrieved 2019-06-02.


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