U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database
Map showing publication footprint
  • Usage in publication:
    • Simonson dolomite*
  • Modifications:
    • Named
  • Dominant lithology:
    • Dolomite
    • Conglomerate
  • AAPG geologic province:
    • Great Basin province
Publication:

Nolan, T.B., 1930, Paleozoic formations in the Gold Hill quadrangle, Utah: Washington Academy of Sciences Journal, v. 20, no. 17, p. 421-432.


Summary:

Named for Simonson Canyon, west side of Deep Creek Range, Tooele Co, UT in the Great Basin province. No type locality designated. Is characteristically a dark to medium-gray, finely laminated dolomite. Individual beds are 1-2 ft thick. Two non-persistent dolomite conglomerates found within formation, and a third conglomerate found that marks the upper boundary with the Guilmette formation (new). Is nearly 1,000 ft thick. Middle Devonian fossils. Overlies Sevy dolomite (new).

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


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

Sandberg, C.A., and Poole, F.G., 1977, Conodont biostratigraphy and depositional complexes of Upper Devonian cratonic-platform and continental-shelf rocks in the western United States, IN Murphy, M.A., and others, eds., Proceedings of the 1977 annual meeting of the Paleontological Society on Devonian of western North America: University of California-Riverside, Campus Museum Contributions, Paleontological Society, 1977 annual meeting, Riverside, CA, November, 1977, no. 4, p. 144-182.


Summary:

Red Warrior Limestone abandoned. Its rocks reassigned, in the Star Range, Beaver Co, UT in the Great Basin province, to the lower part of the Upper Devonian Pinyon Peak Limestone, the Devonian Sevy Dolomite, Simonson Dolomite, and Guilmette Formation, and to the Silurian Laketown Dolomite. [Of Devonian age.]

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


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

Steven, T.A., and Morris, H.T., 1983, Geologic map of the Cove Fort quadrangle, west-central Utah: U.S. Geological Survey Miscellaneous Investigations Series Map, I-1481, scale 1:50,000


Summary:

Areally extended to the Dog Valley Mountain area in the northeast part of the quad in the Great Basin province, where it is younger than the Early and Middle Devonian Sevy Dolomite and older than the Late Devonian Cove Fort Quartzite. Assigned a Middle Devonian age.

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


Map showing publication footprint
  • Usage in publication:
    • Simonson Dolomite*
  • Modifications:
    • Areal extent
  • Dominant lithology:
    • Dolomite
  • AAPG geologic province:
    • Great Basin province
Publication:

Hintze, L.F., and Best, M.G., 1987, Geologic map of the Mountain Home Pass and Miller Wash quadrangles, Millard and Beaver Counties, Utah, and Lincoln County, Nevada: U.S. Geological Survey Miscellaneous Field Studies Map, MF-1950, 1 sheet, scale 1:24,000


Summary:

Is Middle Devonian formation shown only in cross sections in southern part of the Mountain Home Range in western Millard and Beaver Cos, southwest UT (Great Basin province). Is shown to overlie Sevy Dolomite (Lower Devonian). Is shown below Guilmette Formation (Middle? and Upper Devonian). Is described as dark-brownish-gray medium- to coarsely crystalline dolomite containing abundant poorly preserved stromatoporoidal fossil fragments. Regional thickness about 200 m. In subsurface only (see cross sections).

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


Map showing publication footprint
  • Usage in publication:
    • Simonson Dolostone*
  • Modifications:
    • Redescribed
  • Dominant lithology:
    • Dolostone
  • AAPG geologic province:
    • Great Basin province
Publication:

Van Loenen, R.E., 1987, Geologic map of the Mount Grafton Wilderness Study Area, Lincoln and White Pine Counties, Nevada: U.S. Geological Survey Miscellaneous Field Studies Map, MF-1938, scale 1:50,000


Summary:

Redescribed on basis of change in lithic designation from dolomite to dolostone (more appropriate term). Is mapped undivided with Sevy Dolostone in study area, Lincoln and White Pine Cos, NV in east-central part of Great Basin province. No complete section present in area. Uppermost part has been displaced by faulting. Uppermost beds present are brown-weathering, cliff-forming, fine- to medium-grained, dark- to medium-gray fossiliferous dolostones. Underlying brown cliff-former is series of alternating dark-brownish-gray, finely crystalline dolostone and medium- to light-gray aphanitic dolostone. Alternating units vary in thickness from 3-5 ft. Darker beds are commonly fetid. Thickness of this incomplete section ranges from 250 to 400 ft. Is in fault contact with overlying Middle and Upper Devonian Guilmette Limestone. Overlies Lower and Middle Devonian Sevy Dolostone. Age is Middle Devonian.

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


Map showing publication footprint
  • Usage in publication:
    • Simonson Dolostone*
  • Modifications:
    • Redescribed
    • Overview
  • Dominant lithology:
    • Dolostone
  • AAPG geologic province:
    • Great Basin province
Publication:

Poole, F.G., Stewart, J.H., Palmer, A.R., Sandberg, C.A., Madrid, R.J., Ross, R.J., Jr., Hintze, L.F., Miller, M.M., and Wrucke, C.T., 1992, Latest Precambrian to latest Devonian time; development of a continental margin, Chapter 2, IN Burchfiel, B.C., Lipman, P.W., and Zoback, M.L., eds., The Cordilleran Orogen; conterminous United States: Geological Society of America, The Geology of North America, The Decade of North American Geology (DNAG), v. G-3, p. 9-56.


Summary:

Is redescribed as dolostone. The name "dolostone" is used for rocks composed predominantly of the mineral "dolomite" on Figure 2 and throughout this chapter, although in the literature it has been common practice to use dolomite rather than dolostone in formal names of dolomitic formations and members. Occurs in stratigraphic column for west-central UT (Great Basin province); unconformably above Sevy Dolostone (redescribed) (Lower Devonian); conformably below Guilmette Formation (Middle and Upper Devonian). In stratigraphic column for east-central NV (Great Basin province); unconformably above McColley Canyon Formation (Lower Devonian); conformably below Guilmette Limestone. Assigned to Eifelian and Givetian (Middle Devonian).

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


Search archives

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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).