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Map showing publication footprint
  • Usage in publication:
    • Wachsmuth limestone*
  • Modifications:
    • Named
    • Biostratigraphic dating
  • Dominant lithology:
    • Limestone
    • Dolomite
  • AAPG geologic province:
    • Alaska Northern region
Publication:

Bowsher, A.L., and Dutro, J.T., Jr., 1957, The Paleozoic section in the Shainin Lake area, central Brooks Range, Alaska, IN Exploration of Naval Petroleum Reserve No. 4 and adjacent areas, northern Alaska, 1944-53; Part 3, Areal geology: U.S. Geological Survey Professional Paper, 303-A, p. A1-A39, (incl. geologic map, scale 1:63,360) [Available online from the USGS PubsWarehouse: http://pubs.er.usgs.gov/pubs/pp/pp303A]


Summary:

Named as lower formation (of 2) of Lisburne group (rank raised). Composite type section designated on south face of Mount Wachsmuth (68 deg 19'20"N, 150 deg 54'30"W) and along west slope of Mount Wachsmuth and up south face of Sugarloaf Hill (68 deg 19'20"N, 150 deg 53'15"W) central Brooks Range, northern AK. Divided into four informal members (ascending): shaly limestone, crinoidal limestone, dolomite, and banded chert-limestone. Measured type sections have total thickness of 1230 ft. Underlies Alapah limestone (new) of Lisburne group and overlies Kayak shale (new) both disconformably. Age is Early Mississippian on basis of megafossils.

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


Map showing publication footprint
  • Usage in publication:
    • Wachsmuth Limestone*
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • Alaska Northern region
Publication:

Dutro, J.T., Jr., 1987, Revised megafossil biostratigraphic zonation for the Carboniferous of northern Alaska, 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. 359-364., Prepared by SEPM Pacific Section and Alaska Geol. Soc


Summary:

Age is considered Early and Late Mississippian in central Brooks Range based on revised megafossil zonations. Assemblages (brachiopods, blastoids, corals, crinoids, and bryozoans) range from Osagean to Meramecian in age.

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 ([ ]).

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