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Map showing publication footprint
  • Usage in publication:
    • Circle Creek Rhyolite*
  • Modifications:
    • Named
  • Dominant lithology:
    • Rhyolite
  • AAPG geologic province:
    • Great Basin province
Publication:

Coats, R.R., 1968, The Circle Creek Rhyolite; a volcanic dome complex in northern Elko County, Nevada, IN Coats, R.R., Hay, R.L., and Anderson, C.A., eds., Studies in volcanology; a memoir in honor of Howel Williams: Geological Society of America Memoir, 116, p. 69-106.


Summary:

Named for exposures at type locality along Circle Creek, north of Hat Peak, northern Elko Co, NV. Composed of porphyritic rhyolite with vitric to felsic groundmass. Has flow layering and microbrecciation. Intrudes Idavada Volcanics. Unconformably underlies Banbury Formation. Age is early Pliocene.

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


Map showing publication footprint
  • Usage in publication:
    • Circle Creek Rhyolite*
  • Modifications:
    • Geochronologic dating
  • AAPG geologic province:
    • Great Basin province
Publication:

McKee, E.H., Tarshis, A.L., and Marvin, R.F., 1976, Summary of radiometric ages of Tertiary volcanic and selected plutonic rocks in Nevada; Part V, Northeastern Nevada: Isochron/West, no. 16, p. 15-27.


Summary:

Circle Creek Rhyolite. Sample from Lat. 41 deg. 53 min. 30 sec. N., Long. 116 deg. 25 min. 00 sec. W., in sec. 18, T. 46 N., R. 50 W., Elko County, Nevada, yielded a K-Ar age of 13.8 +/-0.8 Ma (biotite). Sample from Lat. 41 deg. 54 min. 00 sec. N., Long. 116 deg. 22 min. 36 sec. W., in SW/4 sec. 9, T. 46 N., R. 50 W., Elko County, Nevada, yielded a K-Ar age of 11.6 +/-0.5 Ma (sanidine).

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


Map showing publication footprint
  • Usage in publication:
    • Circle Creek Rhyolite*
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • Great Basin province
Publication:

Coats, R.R., 1987, Geology of Elko County, Nevada: Nevada Bureau of Mines and Geology Bulletin, no. 101, 112 p., (incl. geologic map, scale 1:250,000), Prepared in cooperation with USGS


Summary:

Isotopic age of 11.6 +/-0.5 Ma, from sanidine sample, given. Age is considered middle Miocene by Palmer (1983).

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


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