Pg. 18-48. Cimarron series [or Cimarron group]. Upper part (1,100 to 1,250 feet of prevailingly red unfossiliferous rocks) of Permian of Kansas. Overlies, probably unconformably, the Big Blue or limestone-bearing series of Permian and unconformably underlies Cretaceous deposits. Divided into ten formations (descending): Big Basin sandstone, Hackberry shales, Day Creek dolomite, Red Bluff sandstones, Salt Plain measures, and Harper sandstones. Age is Permian.
Named from Cimarron River, central southern KS.
[USGS adopted Cimarron Group for use in its publications (US geologic names lexicon, USGS Bull. 896, p. 444, ca. 1938); term later abandoned (see US geologic names lexicon, USGS Bull. 1200, p. 804).]
Source: US geologic names lexicon (USGS Bull. 896, p. 444); GNC KS-NE Permian Corr. Chart, Oct. 1936.
Pg. 1677, 1678. Cimarron series of northern Midcontinent region should be abandoned and its constituent strata reclassified as belonging to Leonard series and Guadalupe series.
Source: US geologic names lexicon (USGS Bull. 1200, p. 804).
Pg. 1764 (fig. 3), 1766-1814. Cimarron series. Succeeding Milan limestone, top member of Wellington formation, without a break, are red shales and sandstones and higher evaporite beds of Kansas which constitute Cimarron series, which includes all succeeding Permian redbeds of the State, divided by Cragin (1896) into Salt Fork and Kiger divisions. Series comprised (ascending) Ninnescah shale, Stone Corral dolomite, Nippewalla group (new, which includes Harper sandstone redefined, Salt Plain formation, Cedar Hills sandstone, and Flowerpot [Flower-pot] shale), Blaine formation, Whitehorse formation, Day Creek dolomite, and Big Basin formation. Overlies Big Blue series.
Source: US geologic names lexicon (USGS Bull. 1200, p. 804).
Chart. Cimarron Stage of Kansas includes (descending) Nippewalla and Sumner Groups. Top stage in Lower Permian Series, above Gearyan Stage (Lower Permian Series), and below Custerian Stage (Upper Permian Series).
[GNC remark (ca. 2010): Cimarron Stage replaced with Leonardian Series (see Savin and others, 2008, Kansas Geol. Survey Bull., no. 254, pt. 2; available online http://www.kgs.ku.edu/Current/2008/Sawin/index.html).]
Source: Publication.
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
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