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Geologic Unit: Little Muddy Creek
Map showing publication footprint
  • Usage in publication:
    • Little Muddy Creek conglomerate*
  • Modifications:
    • Biostratigraphic dating
  • AAPG geologic province:
    • Green River basin
Publication:

Jacobson, S.R., and Nichols, D.J., 1982, Palynological dating of syntectonic units in the Utah-Wyoming thrust belt; the Evanston Formation, Echo Canyon Conglomerate, and Little Muddy Creek Conglomerate, IN Powers, R.B., ed., Geologic studies of the Cordilleran thrust belt: Rocky Mountain Association of Geologists Field Conference Guidebook, p. 735-750.


Summary:

An informal name mapped by Veatch (1907) and Walker (1950). Considered to be a syntectonic deposit that resulted from early movement on the Absaroka fault. Has some pollen types that also occur in the Bear River Formation. CHATANGIELLA Interval zone (marine) and PROTEACIDITES RETUSUS Interval Zone (nonmarine) contemporaneous palynomorph biozones. Assigned a Cenomanian age. Samples collected in Lincoln Co, WY in the Greater Green River basin.

Source: 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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