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Map showing publication footprint
  • Usage in publication:
    • Spor Mountain flows, latite flows
  • Modifications:
    • First used
  • AAPG geologic province:
    • Great Basin province
Publication:

Hogg, N.C., 1972, Shoshonitic lavas in west-central Utah: Brigham Young University Geology Studies, v. 19, pt. 2, p. 133-184.


Summary:

First use of Spor Mountain flows and latite flows. Age is late Tertiary.

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


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

Lindsey, D.A., 1979, Geologic map and cross sections of Tertiary rocks in the Thomas Range and northern Drum Mountains, Juab County, Utah: U.S. Geological Survey Miscellaneous Investigations Series Map, I-1176, 1 sheet, scale 1:62,500


Summary:

Named for Spor Mountain. Type section is in secs 8 and 9, T13S, R12W, Juab Co, UT, Great Basin province. Divided into a beryllium tuff member (base) 20-60 m thick and a porphyritic rhyolite member (top) about 500 m thick. Basal member is a stratified, tan vitric tuff and tuffaceous breccia with abundant clasts of carbonate rocks and a few clasts of quartzite and volcanic rocks. Thin beds of bentonite, ash-flow tuff, epiclastic sandstone and conglomerate also present in basal member. Upper member consists of flows, domes, and plugs of gray to red porphyritic rhyolite and alkali rhyolite erupted from vents around Spor Mountain. Is younger than Needles Range Formation. Is older than Topaz Mountain Rhyolite. Of early Miocene age.

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


Map showing publication footprint
  • Usage in publication:
    • Spor Mountain Tuff*
  • Modifications:
    • Geochronologic dating
  • AAPG geologic province:
    • Great Basin province
Publication:

Lindsey, D.A., 1982, Tertiary volcanic rocks and uranium in the Thomas Range and northern Drum Mountains, Juab County, Utah: U.S. Geological Survey Professional Paper, 1221, 71 p. [Available online from the USGS PubsWarehouse: http://pubs.er.usgs.gov/pubs/pp/pp1221]


Summary:

Has an average age of 21.3 +/-0.2 m.y. Minerals dated were sanidine and zircon. Is separated from older rocks and from the younger Topaz Mountain Rhyolite by unconformities. Of early Miocene age. In Great Basin province.

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


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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 ( ).

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