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Map showing publication footprint
  • Usage in publication:
    • Antelope rhyolite
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Rhyolite
  • AAPG geologic province:
    • Plateau sedimentary province
Publication:

Lausen, Carl, 1931, Geology and ore deposits of the Oatman and Katherine districts, Arizona: Arizona Bureau of Mines Bulletin, no. 131, 126 p., Also issued as Arizona Bur. Mines Geol. Ser., no. 6, and Univ. Arizona Bull., v. 2, no. 2


Summary:

Antelope rhyolite. Age is Tertiary(?). Occurs in Oatman district, Mohave County, northwestern Arizona.

Source: US geologic names lexicon (USGS Bull. 896, p. 56).


Map showing publication footprint
  • Usage in publication:
    • Antelope Rhyolite*
  • Modifications:
    • Age modified
    • Geochronologic dating
  • AAPG geologic province:
    • Plateau sedimentary province
Publication:

DeWitt, Ed, Thorson, J.P., and Smith, R.C., 1991, Geology and gold deposits of the Oatman district, northwestern Arizona, IN DeWitt, Ed, and others, Epithermal gold deposits, Part II: U.S. Geological Survey Bulletin, 1857-I, p. 1-28.


Summary:

Consists of flows and domes of subalkalic rhyodacite to rhyolite. Contains 70 percent groundmass and 30 percent phenocrysts--dominantly plagioclase--also has biotite, potassium feldspar, quartz, hornblende, and minor clinopyroxene and orthopyroxene. Has high rubidium content. Overlies Gold Road Dacite (redescribed). Underlies Cottonwood Formation (redescribed). Mapped (geologic maps) west of Oatman, Mohave Co, AZ in the Plateau sedimentary province. Biotite (K-Ar) from Antelope yielded a 19.2 +/-0.9 Ma date. Age modified from Tertiary to Miocene. Chemical analyses.

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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