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Geologic Unit: Sheldon
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  • Usage in publication:
    • Sheldon limestone bed
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Limestone
  • AAPG geologic province:
    • Nemaha anticline
Publication:

Condra, G.E., 1930, Correlation of the Pennsylvanian beds in the Platte and Jones Point sections of Nebraska: Nebraska Geological Survey Bulletin, 2nd series, no. 3, 57 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. 47. Sheldon limestone bed of Calhoun shale member of Shawnee group. The limestone underlying Iowa Point shale and overlying Jones Point shale is not Meadow limestone (which belongs down in Stanton limestone), and is here named Sheldon limestone. In Sand Point section, Cass County, southeastern Nebraska, it consists of 3.5 feet of massive bluish-gray fossiliferous limestone that weathers buff or brownish. It is middle member of Calhoun shale. Fossils (ALLORISMA TERMINALE, bryozoans, brachiopods, crinoid joints, etc.) Age is Pennsylvanian.
[Origin of name not stated.]

Source: US geologic names lexicon (USGS Bull. 896, p. 1977); GNC KS-NE Pennsylvanian Corr. Chart, sheet 1, Oct. 1936; supplemental information from GNU records (USGS DDS-6; Denver GNULEX).


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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