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Map showing publication footprint
  • Usage in publication:
    • Monotony Tuff
  • Modifications:
    • First used
    • Geochronologic dating
  • AAPG geologic province:
    • Great Basin province
Publication:

Marvin, R.F., Byers, F.M., Jr., Mehnert, H.H., Orkild, P.P., and Stern, T.W., 1970, Radiometric ages and stratigraphic sequence of volcanic and plutonic rocks, southern Nye and western Lincoln Counties, Nevada: Geological Society of America Bulletin, v. 81, no. 9, p. 2657-2676.


Summary:

First use of the Monotony Tuff. Age is late Oligocene based on isotopic age (K-Ar; biotite) of 27.6 Ma.

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


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

Ekren, E.B., Anderson, R.E., Rogers, C.L., and Noble, D.C., 1971, Geology of northern Nellis Air Force Base Bombing and Gunnery Range, Nye County, Nevada: U.S. Geological Survey Professional Paper, 651, 91 p., (incl. geologic map, scale 1:125,000) [Available online from the USGS PubsWarehouse: http://pubs.er.usgs.gov/pubs/pp/pp651]


Summary:

Unite is named the Monotony Tuff. Consists of rhyodacitic ash-flow tuff with phenocrysts of plagioclase, quartz, and biotite. Weathers rusty or green brown. Thickness is 700 m at type; ranges from 300 to 700 m. Overlies Paleozoic rocks; underlies the Shingle Pass Tuff. Age is late Oligocene based on isotopic ages (K-Ar; biotite) of 26.1 +/-0.71 and 27.6 +/-0.8 Ma. (B1520)

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


Map showing publication footprint
  • Usage in publication:
    • Monotony Tuff*
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • Great Basin province
Publication:

Hurtubise, D.O., and du Bray, E.A., 1992, Stratigraphy and structure of the Seaman Range and Fox Mountain, Lincoln and Nye Counties, Nevada, IN Evolution of sedimentary basins; eastern Great Basin: U.S. Geological Survey Bulletin, 1988-B, p. B1-B31.


Summary:

Monotony Tuff is geographically extended into the area of the report. Age is Oligocene.

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


Map showing publication footprint
  • Usage in publication:
    • Monotony Tuff*
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • Great Basin province
Publication:

Rowley, P.D., Shroba, R.R., Simonds, F.W., Burke, K.J., Axen, G.J., and Olmore, S.D., 1994, Geologic map of the Chief Mountain quadrangle, Lincoln County, Nevada: U.S. Geological Survey Geologic Quadrangle Map, GQ-1731, 1 sheet, scale 1:24,000 [http://ngmdb.usgs.gov/Prodesc/proddesc_11017.htm]


Summary:

Monotony Tuff is geographically extended into the report area. Age is Oligocene.

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


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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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