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Map showing publication footprint
  • Usage in publication:
    • Kulthieth formation*
  • Modifications:
    • Named
    • Biostratigraphic dating
  • Dominant lithology:
    • Sandstone
    • Siltstone
    • Coal
  • AAPG geologic province:
    • Alaska Southern region
Publication:

Miller, D.J., 1957, Geology of the southeastern part of the Robinson Mountains, Yakataga district, Alaska: U.S. Geological Survey Oil and Gas Investigations Map, OM-187, 2 sheets, scale 1:63,360


Summary:

Named for exposures in area drained by Kulthieth, Kaliakh, and Duktoth Rivers, Type locality designated as measured section in vicinity of small lake at head of northeasternmost branch of Kulthieth River, Robinson Mountains, Yakataga district, southern AK. Consists of nonmarine and marine sandstone and siltstone with intercalated thin beds of high-rank coal. At type locality includes three predominantly sandy units which alternate with three predominantly silty units. Total thickness is at least 9300 ft. Base not seen. Apparently conformably underlies Poul Creek formation. Marine invertebrate fossils collected in upper part have been identified by H.E. Vokes as of late Eocene age. Age of Kulthieth formation given as Paleocene(?) and Eocene in map legend.

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


Map showing publication footprint
  • Usage in publication:
    • Kulthieth Formation*
  • Modifications:
    • Areal extent
    • Age modified
    • Biostratigraphic dating
  • AAPG geologic province:
    • Alaska Southern region
Publication:

Nelson, S.W., Dumoulin, J.A., and Miller, M.L., 1985, Geologic map of the Chugach National Forest, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map, MF-1645-B, 1 sheet, scale 1:250,000


Summary:

Kulthieth Formation geographically extended into Bering River area at expense of Kushtaka Formation (thereby abandoning Kushtaka Formation owing to more widespread extent of Kulthieth and equivalent age and lithology of these two units. Consists of interbedded arkosic sandstone, carbonaceous siltstone and shale, with minor coal. In Chugach National Forest overlies Stillwater Formation; underlies Tokun Formation. Age in Chugach National Forest is Eocene only based on fossil plants (Wolfe, 1977; Turner and others, in press) and mollusks (F.S. MacNeil IN Wolfe, 1977) and on stratigraphic relations with underlying and overlying formations. [Overall age remains Paleocene, Eocene, and Oligocene.]

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


Map showing publication footprint
  • Usage in publication:
    • Kulthieth Formation*
  • Modifications:
    • Age modified
    • Biostratigraphic dating
  • AAPG geologic province:
    • Alaska Southern region
Publication:

Plafker, George, 1987, Regional geology and petroleum potential of the northern Gulf of Alaska continental margin, IN Scholl, D.W., Grantz, Arthur, and Vedder, J.A., Geology and Resource potential of the continental margin of western North America and adjacent ocean basins, Beaufort Sea to Baja California: Circum-Pacific Council for Energy and Mineral Resources Earth Science Series, v. 6, p. 229-267.


Summary:

Age of Kulthieth Formation is early Eocene to early Oligocene based on foraminifers, mollusks, and plant leaves. [Shown on correlation chart of central part of Yakutat terrane, fig.6, p.245].

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


Map showing publication footprint
  • Usage in publication:
    • Kulthieth Formation*
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • Alaska Southern region
Publication:

Winkler, G.R., and Plafker, George, 1993, Geologic map and cross sections of the Cordova and Middleton Island quadrangles, southern Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map, I-1984, 1 sheet, scale 1:250,000


Summary:

Age of Kulthieth Formation is revised to Eocene on the basis of fossils.

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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