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Geologic Unit: Mina
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Map showing publication footprint
  • Usage in publication:
    • Mina Formation
  • Modifications:
    • Named
  • Dominant lithology:
    • Volcaniclastics
    • Sandstone
  • AAPG geologic province:
    • Great Basin province
Publication:

Speed, R.C., 1977, Excelsior Formation, west-central Nevada; stratigraphic appraisal, new divisions, and paleogeographic interpretations, IN Stewart, J.H., Stevens, C.H., and Fritsche, A.E., eds., Paleozoic paleogeography of the western United States; Pacific Coast paleogeography symposium I: Society of Economic Paleontologists and Mineralogists, Pacific Section, Pacific Coast Paleogeography Symposium, Bakersfield, CA, April 22, 1977, 1, p. 325-336.


Summary:

Named for town in Douglas Canyon. Type area designated as lower Douglas Canyon, sec.23 T6N R34E, Garfield Hills, 3 to 5 km southwest of town of Mina, Mineral Co, NV. Consists dominantly of volcanogenic turbidite, lesser chert, pelite, and quartz sandstone. Is over 1,000 m thick. Turbidite sequences are fining upward. Is extensively thrust-faulted forming nappes. Base is not exposed. Underlies with angular unconformity Gold Range Formation. Is Permian age on basis of K-Ar ages on hornblende ranging from 255.8 +/-6.0 Ma to 235 +/-5.9( Ma and fossil collection of fusulinids identified by P.P. Orkild and W.J. Carr.

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


Map showing publication footprint
  • Usage in publication:
    • Mina Formation*
  • Modifications:
    • Geochronologic dating
  • AAPG geologic province:
    • Great Basin province
Publication:

Robinson, A.C., and Kistler, R.W., 1986, Maps showing isotopic dating in the Walker Lake 1 degree x 2 degrees quadrangle, California and Nevada: U.S. Geological Survey Miscellaneous Field Studies Map, MF-1382-N, 1 sheet, 49 p., scale 1:125,000


Summary:

K-Ar ages on hornblende and sanidine from samples of Mina Formation collected in Excelsior Mountains southwest of Mina, NV, yielded ages of 267.5 +/-6.7, 261.4 +/-6.5, 245.5 +/-6.1, 240.3 +/-6.1, 229.9 +/-5.6, and 182.7 +/-4.6 Ma.

Source: GNU records (USGS DDS-6; Menlo 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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