U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database
Geologic Unit: Tybo
Search archives
Map showing publication footprint
  • Usage in publication:
    • Tybo shale*
  • Modifications:
    • Named
  • Dominant lithology:
    • Shale
    • Limestone
  • AAPG geologic province:
    • Great Basin province
Publication:

Ferguson, H.G., 1933, Geology of the Tybo district, Nevada: Nevada Bureau of Mines and Geology and Mackay School of Mines Bulletin, no. 20, 61 p., (incl. geologic map, scale 1:24,000), Also issued as Univ. Nevada Bull., v. 27, no. 3, 1933.


Summary:

Tybo shale named for exposures in Tybo Canyon near the camp of Tybo [T6N R49E, Nye Co, NV]. Consists dominantly of fissile olive-gray to dark shale. Thin beds of limestone and calcareous shale with concretions of dense gray limestone appear near the top of the formation. No precise estimate of thickness is possible due to crumpled nature of shales. Probable thickness is about 1600 ft. Conformably overlies Swarbrick formation (new); conformably underlies and grades into Hales limestone (new). Age is Cambrian on the basis of stratigraphic position.

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


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

Rogers, C.L., Kleinhampl, F.J., Ziony, J.I., and Danilchick, Walter, 1970, Phosphate occurrences in Nye County adjacent areas, Nevada, IN Geological Survey Research 1970: U.S. Geological Survey Professional Paper, 700-C, p. C49-C60.


Summary:

Tybo shale is geographically extended into the Antelope Range. Age is Cambrian on the basis of stratigraphic position.

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


Map showing publication footprint
  • Usage in publication:
    • Tybo Shale
  • Modifications:
    • Not used
  • AAPG geologic province:
    • Great Basin province
Publication:

Quinlivan, W.D., and Rogers, C.L., 1974, Geologic map of the Tybo quadrangle, Nye County, Nevada: U.S. Geological Survey Miscellaneous Investigations Series Map, I-821, 1 sheet, scale 1:48,000


Summary:

Tybo shale is not used for shale unit lying between the Swarbrick Formation and the Hales Limestone in the Tybo 15' quad, Nye Co, NV. This unit is referred to at the Dunderberg Shale.

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


Map showing publication footprint
  • Usage in publication:
    • Tybo Shale*†
  • Modifications:
    • Abandoned
  • AAPG geologic province:
    • Great Basin province
Publication:

Kleinhampl, F.J., and Ziony, J.I., 1985, Geology of northern Nye County, Nevada: Nevada Bureau of Mines and Geology Bulletin, no. 99A, 172 p., (incl. geologic map, scale 1:250,000)


Summary:

"Tybo Shale" (Ferguson, 1933) which was recently assigned to the Dunderberg Shale (Quinlivan and Rogers, 1974) is abandoned.

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


Map showing publication footprint
  • Usage in publication:
    • Tybo Shale*
  • Modifications:
    • Reinstated
  • AAPG geologic province:
    • Great Basin province
Publication:

Cook, H.E., Taylor, M.E., Zhemchuzhnikov, S.V., Apollonov, M.K., Ergaliev, G.K., Sargaskaev, Z.S., Dubinina, S.V., and Melnikova, Ludmilla, 1991, Comparison of two early Paleozoic carbonate submarine fans; western United States and southern Kazakhstan, Soviet Union, IN Cooper, J.D., and Stevens, C.H., eds., Paleozoic paleogeography of the western United States; Pacific Coast paleogeography symposium II: Society of Economic Paleontologists and Mineralogists, Pacific Section, Field Trip Guidebook, Bakersfield, CA, March 4-8, 1991, book 67, p. 847-872.


Summary:

Tybo Shale (Ferguson, 1933) is reinstated on the basis of lithologic identity and stratigraphic relations ("... represents a substantially deeper water facies than the Dunderberg Shale and ... is bounded by different formations that the Dunderberg"). Age is Late Cambrian.

Source: GNU records (USGS DDS-6; Menlo 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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).

Accessibility FOIA Privacy Policies and Notices

USA Gov U.S. Department of the Interior | U.S. Geological Survey
Supported by the National Cooperative Geologic Mapping Program
Page Contact Information: Personnel
Page Last Modified: Thu 04 Apr 2024 04:18:34 PM MDT