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Geologic Unit: Kwagunt
Map showing publication footprint
  • Usage in publication:
    • Kwagunt Formation
  • Modifications:
    • First used
  • AAPG geologic province:
    • Plateau sedimentary province
Publication:

Ford, T.D., and Breed, W.J., 1972, The Chuar Group of the Proterozoic, Grand Canyon, Arizona, IN Geologie du Precambrian, Section 1: International Geological Congress, 24th, Report, Montreal, 1972, no. 1, p. 3-10.


Summary:

First use of the Kwagunt Formation of the Chuar Group. Age is late Precambrian.

Source: GNU records (USGS DDS-6; Menlo GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Kwagunt Formation
  • Modifications:
    • Named
  • Dominant lithology:
    • Limestone
    • Dolomite
    • Shale
    • Mudstone
  • AAPG geologic province:
    • Southern Rocky Mountain region
Publication:

Ford, T.D., and Breed, W.J., 1973, Late Precambrian Chuar Group, Grand Canyon, Arizona: Geological Society of America Bulletin, v. 84, no. 4, p. 1243-1260.


Summary:

Named as middle formation of Chuar Group for exposures in Kwagunt Canyon, west side of Colorado River, Coconino Co, AZ in the Southern Rocky Mountain region. No type section designated. Is 2,218 ft thick. Overlies Galeros Formation (new) of Chuar Group. Unconformably underlies Sixty Mile Formation (new) of Chuar. Divided into (ascending): Carbon Butte, Awatubi, and Walcott Members, all newly named. Major lithologies of members include limestone, shale, mudstone, and dolomite. [Kwagunt not described as a unit separate from its members.] Stromatolitic limestone occurs in the Awatubi Member. Of late Precambrian age. Geologic map.

Source: GNU records (USGS DDS-6; Denver GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Kwagunt Formation*
  • Modifications:
    • Adopted
  • AAPG geologic province:
    • Plateau sedimentary province
Publication:

Elston, D.P., 1979, Late Precambrian Sixtymile Formation and orogeny at top of the Grand Canyon Supergroup, northern Arizona: U.S. Geological Survey Professional Paper, 1092, 20 p. [Available online from the USGS PubsWarehouse: http://pubs.er.usgs.gov/pubs/pp/pp1092]


Summary:

Kwagunt Formation of the Chuar Group of the Grand Canyon Supergroup is adopted. Age is late Precambrian.

Source: GNU records (USGS DDS-6; Menlo GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Kwagunt Formation*
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • Plateau sedimentary province
Publication:

Elston, D.P., 1981, Paleomagnetic correlations of Proterozoic rocks [abs.]: U.S. Geological Survey Professional Paper, 1275, p. 139.


Summary:

Age of the Kwagunt Formation is modified from late Precambrian to: Proterozoic Y.

Source: GNU records (USGS DDS-6; Menlo GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Kwagunt Formation*
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • Southern Rocky Mountain region
Publication:

Elston, D.P., 1989, Grand Canyon Supergroup, northern Arizona; stratigraphic summary and preliminary paleomagnetic correlations with parts of other North American Proterozoic successions, IN Jenney, J.P., and Reynolds, S.J., eds., Geologic evolution of Arizona: Arizona Geological Society Digest, v. 17, p. 259-272.


Summary:

Is the upper formation of Chuar Group of Grand Canyon Supergroup. Overlies Galeros Formation of Chuar; unconformably underlies Sixtymile Formation. Is 627 m thick. Age designation of Proterozoic Y changed to Late Proterozoic, the age term applied to rocks younger than 900 Ma and older than 570 Ma. Change in age designation made to Kwagunt and its Carbon Butte (base), Awatubi, and Walcott Members in the Southern Rocky Mountain region of northern AZ. Columnar section.

Source: GNU records (USGS DDS-6; Denver GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Kwagunt Formation*
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Southern Rocky Mountain region
Publication:

Elston, D.P., Link, P.K., Winston, Don, and Horodyski, R.J., 1993, Correlations of Middle and Late Proterozoic successions, IN Link, P.K., ed., Middle and Late Proterozoic stratified rocks of the western U.S. Cordillera, Colorado Plateau, and Basin-and-Range province, Chapter 6, OF Reed, J.C., Jr., and others, eds., Precambrian; conterminous U.S.: Geological Society of America, The Geology of North America, The Decade of North American Geology (DNAG), v. C-2, p. 468-487.


Summary:

CHUARIA-bearing acritarchs and vase-shaped chitinozoan-like microfossils, algal filaments, unicells have been reported from the Kwagunt Formation of Chuar Group of Grand Canyon Supergroup in the northern AZ Southern Rocky Mountain region. Strata bearing these fossils predate the Windermere Supergroup. Stratigraphic chart. Correlation chart. Late Proterozoic age.

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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