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Geologic Unit: Larsh
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Map showing publication footprint
  • Usage in publication:
    • Larsh shale bed
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Shale
  • 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. 40, 43, 49, 50. Larsh shale bed of Deer Creek limestone member of Shawnee formation. Near base of Deer Creek limestone, is 1 foot-8 inches to 2 feet thick in southeastern Nebraska and southwestern Iowa, 6 to 8 feet thick in northwestern Missouri, and 8+ feet thick in northeastern Kansas. Underlies Haynies limestone and overlies Rock Bluff limestone. Age is Late Pennsylvanian (Missouri age). Report includes cross sections, measured sections, geologic maps, stratigraphic tables.
Named from Larsh farm, on Ervine Creek, northeast of Union [Cass Co.] southeastern NE.

Source: US geologic names lexicon (USGS Bull. 896, p. 1152); 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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