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Geologic Unit: Valley
Map showing publication footprint
  • Usage in publication:
    • Valley Member
  • Modifications:
    • First used
  • AAPG geologic province:
    • Michigan basin
Publication:

Wohlabaugh, Norman, and Mancuso, J.J., 1990, Depositional and diagenetic history of the Big Cusp algal dolomite, Kona Formation, Marquette Range, Michigan: The Compass, Sigma Gamma Epsilon Journal of Earth Sciences, v. 67, no. 2, p. 84-93.


Summary:

Valley Member (informal) of Kona Dolomite of Chocolay Group of Marquette Range Supergroup. Authors use nomenclature of G.L. Taylor (1972, Michigan Tech Univ., Ph.D. dissertation). Kona Dolomite comprises (ascending) gray argillite, lower quartzite, cherty dolomite, gray-green argillite, middle quartzite, /Big Cusp algal dolomite member, Valley member, color-banded dolomite, upper quartzite, Ragged Hills member, and upper dolomite. Valley member not described. Deposited during marine transgression.

Source: GNU records (USGS DDS-6; Reston 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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