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Geologic Unit: Sturm
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Map showing publication footprint
  • Usage in publication:
    • Sturm limestone member
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Limestone
  • AAPG geologic province:
    • Nemaha anticline
Publication:

Condra, G.E., and Bengtson, N.A., 1915, The Pennsylvanian formations of southeastern Nebraska: Nebraska Academy of Sciences Publications, v. 9, no. 2, 60 p., See also "Modern classifications of the Pennsylvanian rocks of eastern Kansas and southeastern Nebraska," compiled by M.G. Wilmarth, Secretary of Committee on Geologic Names, USGS unpub. corr. chart, Oct. 1936, sheet 1


Summary:

Pg. 6, 33. Sturm limestone member of Andrew (Lawrence) shale. Light-colored bluish impure limestone that weathers into nodular pellet-like forms. Thickness 6+/- feet. Is in Andrew (Lawrence) shale. Lies 4 feet above Nehawka limestone and 6 feet below Oreapolis limestone. Age is Pennsylvanian. Report includes measured sections, cross sections.
Well exposed along North Branch of Weeping Water Creek between 2 and 4 mi north of Nehawka, with several good exposures near Sturm's Schoolhouse, in sec. 12, T. 10 N., R. 12 E., Cass Co., southeastern NE. It is in bed of Weeping Water Creek 2 mi west-northwest of Nehawka, where it is marked by a ford in the creek. Named from Sturm's Schoolhouse.

Source: US geologic names lexicon (USGS Bull. 896, p. 2079); GNC KS-NE Pennsylvanian Corr. Chart, sheet 1, Oct. 1936; supplemental information from GNU records (USGS DDS-6; Denver GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Sturm limestone†
  • Modifications:
    • Abandoned
Publication:

Condra, G.E., 1927, The stratigraphy of the Pennsylvanian system in Nebraska: Nebraska Geological Survey Bulletin, 2nd series, no. 1, 291 p., See also "Modern classifications of the Pennsylvanian rocks of eastern Kansas and southeastern Nebraska," compiled by M.G. Wilmarth, Secretary of Committee on Geologic Names, USGS unpub. corr. chart, Oct. 1936, sheet 1


Summary:

Pg. 34. Stated that Nehawka limestone is Iatan limestone, but no mention is made of Sturm limestone, and the name appears to have been dropped from the list of geologic units of Nebraska. If Nehawka limestone is Iatan limestone, the Sturm limestone is a bed in Lawrence shale.

Source: US geologic names lexicon (USGS Bull. 896, p. 2079).


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates published by U.S. Geological Survey authors.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).

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