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Geologic Unit: Minnechaduza
Map showing publication footprint
  • Usage in publication:
    • Minnechaduza beds
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • Chadron arch
Publication:

Elias, M.K., 1942, Tertiary prairie grasses and other herbs from the High Plains: Geological Society of America Special Paper, 41, 176 p., See also GSA Bull., v. 51, no. 12, pt. 2, p. 1969, 1940 [abs.], and Amer. Jour. Botany, v. 28, no. 10, suppl. p. 8s, 1941 [abs.] (available online, with subscription, from JSTOR www.jstor.org)


Summary:

Pg. 142. Minnechaduza beds of Ash Hollow formation of Ogallala group. Name suggested for fragmentary layer at base of rim rock [=Cap Rock Member] of Ash Hollow formation. Fauna from this layer was designated the Minnechaduza by Stirton, 1939 (Amer. Jour. Sci., v. 237, no. 6, p. 433). Overlies Valentine sands at Valentine. Contains plant fossils. Age is Pliocene.
Stirton (1939) designated type locality for Minnechaduza fauna on divide between Little Beaver and Crooked Creeks, in SW/4 SW/4 sec. 8, T. 34 N., R. 26 W., north pasture Niobrara Game Refuge, Cherry Co., central northern NE. Named from Minnechaduza Creek.

Source: Modified from US geologic names lexicon (USGS Bull. 1200, p. 2520).


Map showing publication footprint
  • Usage in publication:
    • Minnechaduza Beds[†]
  • Modifications:
    • [Abandoned]
  • AAPG geologic province:
    • Chadron arch
Publication:

Skinner, M.F., and Johnson, F.W., 1984, Tertiary stratigraphy and the Frick Collection of fossil vertebrates from north-central Nebraska: American Museum of Natural History Bulletin, v. 178, art. 3, p. 215-368.


Summary:

[†Minnechaduza Beds of Ash Hollow Formation of Ogallala Group (Elias, 1942) has not been used since its introduction and is considered abandoned. These beds, at base of Cap Rock Member of Ash Hollow, have been referred to as "fragmental layer" or "fragmentary layer" for several decades. Minnechaduza is widely used as a vertebrate faunal name, Minnechaduza Fauna.]

Source: Publication.


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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