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National Geologic Map Database
Geologic Unit: Holitna
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Map showing publication footprint
  • Usage in publication:
    • Holitna group*
  • Modifications:
    • Named
    • Biostratigraphic dating
  • Dominant lithology:
    • Limestone
    • Dolomite
  • AAPG geologic province:
    • Alaska Southwestern region
Publication:

Cady, W.M., Wallace, R.E., Hoare, J.M., and Webber, E.J., 1955, The central Kuskokwim region, Alaska: U.S. Geological Survey Professional Paper, 268, 132 p., (incl. geologic map, scale 1:63,360)


Summary:

Named for Holitna River. Type locality designated on Holitna River in area where limestone crosses southwestward plunging major axis of anticline, southeast of Kuskokwim Mountains, southwestern AK. Typically exposed between mouths of Itulilik and Portage Creeks. Includes various types of limestone that have been changed from originally dense rock to more coarsely crystalline types. Recrystallized facies are partly dolomitic. Nondolomitic limestone is gray on freshly broken surface and weathers to lighter shades. Dolomitic facies characteristically buff colored. Massive rather than thin bedded limestone predominates. Neither basal nor upper contacts are exposed in sections studied along Holitna and Chilnuk Rivers. Estimated thickness is at least 5000 ft and probably closer to 10,000 ft. Is in fault contact with overlying Kuskokwim group (new) along bluffs of Holitna River 9 mi northeast of Nogamut. Fossils identified by Edwin Kirk indicate Ordovician(?), Silurian, and Devonian age.

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


Map showing publication footprint
  • Usage in publication:
    • Holitna Group*
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • Alaska Southwestern region
Publication:

Goldfarb, R.J., Gray, J.E., Pickthorn, W.J., Gent, C.A., and Cieutat, B.A., 1990, Stable isotope systematics of epithermal mercury-antimony mineralization, southwestern Alaska, IN Goldfarb, R.J., Nash, J.T., and Stoeser, J.W., eds., Geochemical studies in Alaska by the U.S. Geological Survey, 1989: U.S. Geological Survey Bulletin, 1950-E, p. E1-E9.


Summary:

(advance copy). Age revised from Ordovician(?) to Devonian --to-- [Middle] Cambrian to [Middle] Devonian based on stratigraphic relations and fossils [Middle Cambrian trilobite; early Middle Devonian (Eifelian) fossils].

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


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 ([ ]).