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Geologic Unit: Cullom
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Map showing publication footprint
  • Usage in publication:
    • Cullom 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. 7, 11, 20, 35. Cullom limestone member of Platte shale. Massive fossiliferous limestone 4 to 8 feet thick. Forms cliff. Overlies Kanwaka shale and lies 6 to 8 feet below Cedar Creek limestone; all included in Platte shale. Carries abundant CAMPOPHYLLUM TORQUIUM. Age is Pennsylvanian. Report includes measured sections, cross sections.
Type locality: in high quarries east of the town of Cullom, Cass Co., NE.

Source: US geologic names lexicon (USGS Bull. 896, p. 553); 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:
    • Cullom limestone bed
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Nemaha anticline
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. 45. Cullom limestone bed of Lecompton limestone member of Shawnee formation. Was named by Condra and Bengston from near Cullom Station, Cass County, southeastern Nebraska. It consists of 2 limestones separated by about 1 foot of bluish gray argillaceous-calcareous fossiliferous shale. The upper limestone is 2 feet thick, gray, massive. In most places lower limestone is somewhat thinner than upper one and weathers yellowish brown. The Cullom limestone is very persistent, holding its faunal and lithologic features from southern Kansas to Rock Bluff, Nebraska, and Folsom, Iowa. Overlies Queen Hill shale and underlies King Hill shale, also of Lecompton. Age is Late Pennsylvanian (Missouri age). Report includes cross sections, measured sections, geologic maps, stratigraphic tables.

Source: US geologic names lexicon (USGS Bull. 896, p. 553); 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:
    • Cullom limestone†
  • Modifications:
    • Abandoned
  • 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. 11, 13. †Cullom limestone abandoned, as another name has priority. The so-called Cullom limestone of Condra (1927, Nebraska Geological Survey Bull., 2nd ser., no. 1) is DeKalb limestone member.

Source: US geologic names lexicon (USGS Bull. 896, p. 553); GNC KS-NE Pennsylvanian Corr. Chart, sheet 1, Oct. 1936.


Map showing publication footprint
  • Usage in publication:
    • Cullom limestone†
  • Modifications:
    • Abandoned
  • AAPG geologic province:
    • Nemaha anticline
Publication:

Moore, R.C., 1936, Stratigraphic classification of the Pennsylvanian rocks of Kansas: Kansas Geological Survey Bulletin, no. 22, 256 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 2


Summary:

Pg. 100. Studies by Condra, F.C. Greene, and Moore in Oct. 1932, indicate that †Cullom limestone (abandoned) is equivalent to lower part of Westerville limestone.

Source: US geologic names lexicon (USGS Bull. 896, p. 553); GNC KS-NE Pennsylvanian Corr. Chart, sheet 2, Oct. 1936.


Map showing publication footprint
  • Usage in publication:
    • Cullom limestone†
  • Modifications:
    • Abandoned
  • AAPG geologic province:
    • Nemaha anticline
Publication:

Condra, G.E., and Reed, E.C., 1937, Correlation of the members of the Shawnee group in southeastern Nebraska and adjacent areas of Iowa, Missouri, and Kansas: Nebraska Geological Survey Bulletin, 2nd series, no. 11, 64 p., June 1937


Summary:

Pg. 57. Condra (1927, Nebraska Geol. Survey Bull., no. 1, 2nd ser.) wrongly correlated Beil limestone as Collum. At Collum Station, the bed so named is part of Westerville limestone.

Source: US geologic names lexicon (USGS Bull. 896, p. 553).


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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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