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Geologic Unit: Nulato
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Map showing publication footprint
  • Usage in publication:
    • Nulato formation*
  • Modifications:
    • Overview
  • Dominant lithology:
    • Sandstone
    • Shale
  • AAPG geologic province:
    • Alaska West-Central region
Publication:

Martin, G.C., 1926, Mesozoic stratigraphy of Alaska: U.S. Geological Survey Bulletin, 776, 493 p.


Summary:

Typically exposed in northwest bank of Yukon River for 2 to 10 mi above Nulato, lower Yukon and Nulato Bay districts, west-central AK. Includes Nulato sandstones of Dall and Harris (1892). Consists of marine sandstone and shale probably about 3000 ft thick. Contains marine invertebrates and few fossil plants. Conformably overlies Melozi formation (new). Conformably underlies Kaltag formation (new). Age is Late Cretaceous based on fossils. [Extensive list of fossils identified by several paleontologists included in report.]

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


Map showing publication footprint
  • Usage in publication:
    • Nulato formation*
  • Modifications:
    • Revised
    • Age modified
    • Biostratigraphic dating
  • AAPG geologic province:
    • Alaska West-Central region
Publication:

Imlay, R.W., and Reeside, J.B., Jr., 1954, Correlation of the Cretaceous formations of Greenland and Alaska: Geological Society of America Bulletin, v. 65, no. 3, p. 223-246.


Summary:

Correlation chart shows Nulato formation in Shaktolik group in Nulato-Norton Bay and lower Yukon area. Age shown as Early Cretaceous (Albian) based on [reexamination] of fossils from unit.

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


Map showing publication footprint
  • Usage in publication:
    • Nulato Formation*
  • Modifications:
    • Revised
    • Age modified
    • Biostratigraphic dating
  • AAPG geologic province:
    • Alaska West-Central region
Publication:

Patton, W.W., Jr., 1973, Reconnaissance geology of the northern Yukon-Koyukuk province, Alaska, IN Shorter contributions to general geology: U.S. Geological Survey Professional Paper, 774-A, p. A1-A17.


Summary:

[Nulato Formation is removed from Shaktolik Group due to abandonment of name Shaktolik.] Age is Early and Late Cretaceous due to recent discovery of Cenomanian mollusk TURRILITES ACUTUS Passy in upper part of marine beds of Nulato on Anvik River (D.L. Jones, written commun., 1968).

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


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Asterisk (*) indicates published by U.S. Geological Survey authors.

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