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National Geologic Map Database

Geologic Unit: Nemaha

Usage:

/Nemaha subgroup [informal] of Wabaunsee Group (KS)

["Subgroup" not recognized as a formal stratigraphic rank term (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). Nemaha subgroup considered informal and should not be capitalized.]


Subunits:

(alphabetical) --all in KS: Auburn Shale, Bern Limestone, Emporia Limestone, Willard Shale.


Geologic age:

Late Pennsylvanian (Virgilian)


Type section, locality, area and/or origin of name:

Best developed in Big Nemaha Valley, with exposures between Tecumseh and Humboldt and between Union and Nebraska City, north of Rulo, and at mouth of the Big Nemaha, [Cass, Johnson, Nemaha, Otoe, Pawnee, and Richardson Cos.], southeastern NE (Condra and Bengtson, 1915).
Type locality: Big Nemaha Valley between south of Falls City and southeast of Rulo, Richardson Co., southeastern NE.


AAPG geologic province:

Nemaha anticline
Forest City basin


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).