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Geologic Unit: Mount Champion
Map showing publication footprint
  • Usage in publication:
    • Mount Champion quartz monzonite
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Quartz monzonite
  • AAPG geologic province:
    • Southern Rocky Mountain region
Publication:

Howell, J.V., 1919, Twin Lakes district of Colorado; Lake and Pitkin Counties: Colorado Geological Survey Bulletin, no. 17, 108 p., (incl. geologic map, scale 1:62,500)


Summary:

Pg. 43. Mount Champion quartz monzonite. A light-gray crystalline rock of medium texture. Typically exposed on Mount Champion, Lake County, central Colorado. Age is probably pre-Cambrian.
[Notable exposures in Chaffee and Lake Cos., central CO.]

Source: US geologic names lexicon (USGS Bull. 896, p. 1433).


Map showing publication footprint
  • Usage in publication:
    • Mount Champion Quartz Monzonite
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Southern Rocky Mountain region
Publication:

Tweto, Ogden, 1977, Nomenclature of Precambrian rocks in Colorado, IN Contributions to stratigraphy: U.S. Geological Survey Bulletin, 1422-D, p. D1-D22.


Summary:

Obsolete; name not used since introduction. Was used in Sawatch Range, Southern Rocky Mountain region. Listed with granitic rocks of circa 1,700 m.y. (Precambrian X) age group.

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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