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National Geologic Map Database
Geologic Unit: Deceit
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Map showing publication footprint
  • Usage in publication:
    • Deceit Formation
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Limestone
    • Dolomite
    • Shale
  • AAPG geologic province:
    • Selawik Lowland basin
Publication:

Ryherd, T.J., and Paris, C.E., 1987, Ordovician through Silurian carbonate base-of-slope apron sequence, north Seward Peninsula, Alaska [extended abs.], IN Tailleur, I.L., and Weimer, Paul, eds., Alaskan North Slope geology; Volume 1: Society of Economic Paleontologists and Mineralogists, Pacific Section, North Slope Seminar II, AAPG/SEPM/SEG Pacific Section annual meeting, Anchorage, AK, May 22-24, 1985, book 50, p. 347-348., Prepared by SEPM Pacific Section and Alaska Geol. Soc


Summary:

Pg. 347-348, fig. 1. See also H.T. Mullins and H.E. Cook, 1986, Carbonate apron models, IN Sed. Geol. Deceit Formation. Three sections related by fossil and facies data but complicated by faulting and poor exposure. Upper part severely brecciated. Includes (descending) 60 m thick dolomite and limestone member of Silurian age (inner apron); >185 m thick limestone member of Silurian age (inner to outer apron); and >70 m thick shale and limestone (basin plain) of Ordovician to Silurian age. Contacts unknown. May correlate with platform carbonates in York Mountains and in Baird Mountains. Age is Ordovician to Silurian.
Type section (composite): Kotzebue Sound as well as at Cape Deceit. Named from Cape Deceit, west-central AK.

Source: GNC index card files (USGS-Menlo).


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