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Geologic Unit: McGee
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Map showing publication footprint
  • Usage in publication:
    • McGee glacial stage
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Till
  • AAPG geologic province:
    • Great Basin province
Publication:

Blackwelder, Eliot, 1931, Pleistocene glaciation in the Sierra Nevada and Basin Ranges: Geological Society of America Bulletin, v. 42, no. 4, p. 865-922, (incl. geologic map, scale 1:31,680)


Summary:

Pg. 865-922; 1930 [abs.], GSA Bull., v. 41, p. 91-92. McGee stage. Oldest glacial stage on east slope of Sierra Nevada. Represented by several thick patches of a deposit strongly resembling till and consisting largely of granite debris resting on Paleozoic limestone and marble. Correlated with Nebraskan stage. Age is Pleistocene.
Best exposed on high ridge west of McGee Peak, Mount Morrison quadrangle, Sierra Nevada, central CA [considered type locality by Putnam, 1949].

Source: US geologic names lexicon (USGS Bull. 896, p. 1252).


Map showing publication footprint
  • Usage in publication:
    • McGee glacial stage
    • McGee till
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • Great Basin province
Publication:

Putnam, W.C., 1949, Quaternary geology of the June Lake district, California: Geological Society of America Bulletin, v. 60, no. 8, p. 1281-1302, (incl. geologic map, scale 1:70,400)


Summary:

Pg. 1289. McGee glacial stage; McGee till. Aeolian Buttes till (new) may be equivalent in age to McGee glacial stage but the Aeolian Buttes can be dated with respect to local volcanic and glacial events; McGee at its type locality 25 miles southeast cannot; therefore new name is proposed. Age is Pleistocene.

Source: US geologic names lexicon (USGS Bull. 1200, p. 2298).


Map showing publication footprint
  • Usage in publication:
    • McGee glacial stage
    • McGee till
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • Great Basin province
Publication:

Putnam, W.C., 1960, Origin of Rock Creek and Owens River gorges, Mono County, California: University of California Publications in Geological Sciences, v. 34, no. 5, p. 221-280, (incl. geologic map, scale 1:24,000)


Summary:

Pg. 233. McGee glacial stage; McGee till. Name Aeolian Buttes till considered invalid as representing an earlier Pleistocene, pre-Sherwin stage. Hence, glacial sequence on eastern slope of Sierra Nevada is McGee, Sherwin, Tahoe, and Tioga.
[GNC remark (ca. 1966, US geologic names lexicon, USGS Bull. 1200, p. 3809): Name amended to McGee Glaciation in compliance with 1961 Code of Stratigraphic Nomenclature. Adopted by the USGS.]

Source: US geologic names lexicon (USGS Bull. 1200, p. 2298).


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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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