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Map showing publication footprint
  • Usage in publication:
    • Fourmile limestone member
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Limestone
    • Shale
  • AAPG geologic province:
    • Nemaha anticline
    • Forest City basin
Publication:

Condra, G.E., and Upp, J.E., 1931, Correlation of the Big Blue series in Nebraska: Nebraska Geological Survey Bulletin, 2nd series, no. 6, 74 p., See also "Modern classifications of the Permian rocks of Kansas and Nebraska," compiled by M.G. Wilmarth, Secretary of Committee on Geologic Names, USGS unpub. corr. chart, Oct. 1936, 1 sheet


Summary:

Pg. 31. Fourmile limestone. Basal member of Wreford limestone of Chase group. Thickness in Nebraska about 7.5 feet; increasing northward to 20 or more feet at Strong, Cambridge, and Dexter, Kansas. With exception of about 1 foot of gray shale above a thin basal cherty limestone, the Fourmile member is massive gray to bluish-gray chert-bearing limestone, but its chert content decreases somewhat from southern Kansas into Oklahoma. Underlies Havensillve shale member of Wreford limestone; overlies Garrison formation of Council Grove group. Age is Permian (Big Blue).
Type locality: head of a branch of Fourmile Creek, near KS-NE line, about 10.5 mi south and 0.5 mi east of Humboldt, southeastern Nebraska. Named from Fourmile Creek, in southwestern part of Richardson Co., southeastern NE.

Source: US geologic names lexicon (USGS Bull. 896, p. 765); GNC KS-NE Permian Corr. Chart, Oct. 1936.


Map showing publication footprint
  • Usage in publication:
    • Fourmile limestone member
  • Modifications:
    • Not used
  • AAPG geologic province:
    • Nemaha anticline
    • Forest City basin
Publication:

Moore, R.C., 1936, Pennsylvanian and lower "Permian" rocks of the Kansas-Missouri region: Kansas Geological Society Guidebook for the Annual Field Conference, no. 10, p. 7-73., See also USGS unpub. corr. charts of Pennsylvanian and Permian rocks of KS and NE, compiled by M.G. Wilmarth, Secretary of Committee on Geologic Names, Oct. 1936


Summary:

Pg. 12. Fourmile limestone member of Wreford limestone of Chase group. Replaced Fourmile limestone of Condra and Upp with new name Threemile limestone, probably because of prior use of Fourmile for a sandstone in Oklahoma.

Source: US geologic names lexicon (USGS Bull. 896, p. 1586).


Map showing publication footprint
  • Usage in publication:
    • Fourmile limestone member
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Nemaha anticline
    • Forest City basin
Publication:

Wilmarth, M.G., 1936, [Selected Geologic Names Committee remarks (ca. 1935-1938) on Carboniferous and Permian rocks of the Midcontinent], IN Wilmarth, M.G., 1938, Lexicon of geologic names of the United States (including Alaska): U.S. Geological Survey Bulletin, 896, pts. 1-2, 2396 p.


Summary:

E.C. Reed (Asst. State Geol. Nebraska), 1936 (letter dated Oct. 16). Nebraska State Survey continues to use Fourmile for the limestone for which Kansas Survey has substituted Threemile.

Source: US geologic names lexicon (USGS Bull. 896, p. 1586); GNC KS-NE Permian Corr. Chart, Oct. 1936.


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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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