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National Geologic Map Database
Geologic Unit: Cactus
Map showing publication footprint
  • Usage in publication:
    • Cactus Quartz Monzonite
  • Modifications:
    • Named
  • AAPG geologic province:
    • Great Basin province
Publication:

McKelvey, G.E., 1973, Geology of the Imperial Mine area, San Francisco Mountains, Beaver County, Utah: Utah Geological Association Publication, no. 3, p. 57-62.


Summary:

Unit is named the Cactus Quartz Monzonite. Consists of dark-gray, medium-grained, holocrystalline, generally altered quartz monzonite. Includes stock and dike. Intrudes Paleozoic sedimentary rocks. Age is Tertiary.

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


Map showing publication footprint
  • Usage in publication:
    • granodiorite of Cactus stock
  • Modifications:
    • Geochronologic dating
  • AAPG geologic province:
    • South Western Overthrust
Publication:

Marvin, R.F., and Dobson, S.W., 1979, U.S. Geological Survey radiometric ages; Compilation "B": Isochron/West, no. 26, p. 3-32.


Summary:

Pg. 28, geologic time scale (inside front cover). granodiorite of Cactus stock [in Cactus Quartz Monzonite]. Granodiorite sample from Portal Cactus Mine audit, San Francisco district, in NE/4 sec. 9, T. 27 S., R. 13 W., Lat. 38 deg. 29 min. 03 sec. N., Long. 113 deg. 18 min. 46 sec. W., Frisco quadrangle, Beaver County, Utah, yielded a K-Ar age of 28.7 +/-0.9 Ma (biotite). Age of 28 Ma published by Marvin (1968); recalculated using decay constants of Steiger and Jager, 1977 (Earth Planet. Sci. Letters, v. 36, p. 359-362). [Oligocene, based on time scale of Berggren, 1972, Lethaia, v. 5, no. 2, p. 195-215.]

Source: Publication.


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates published by U.S. Geological Survey authors.

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