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National Geologic Map Database
Geologic Unit: Towanda
Map showing publication footprint
  • Usage in publication:
    • Towanda limestone member
  • Modifications:
    • Revised
    • Areal extent
  • AAPG geologic province:
    • Nemaha anticline
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:

Towanda limestone member of Doyle formation of Chase group. Persists widely as a very irregular unit. We have observed its outcrop at many places [mentioned] from type locality northward in Kansas and at several places in Nebraska [mentioned]. In places (as northeast of Barnes, Kansas) it consists of 3 rather massive limestones and interbedded shale, but at most places between type locality and Nebraska it is represented by 5 to 10 feet or more or drab-colored slabby limestones that weather very irregularly and yellowish brown. Overlies Holmesville shale (basal member of Doyle) and underlies Gage shale (top member of Doyle). Age is Permian (Big Blue).

Source: US geologic names lexicon (USGS Bull. 896, p. 2172); GNC KS-NE Permian Corr. Chart, Oct. 1936.


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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