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Geologic Unit: Nada
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  • Usage in publication:
    • Nada Member*
  • Modifications:
    • Named
  • Dominant lithology:
    • Shale
    • Siltstone
  • AAPG geologic province:
    • Cincinnati arch
Publication:

Weir, G.W., Gualtieri, J.L., and Schlanger, S.O., 1966, Borden Formation (Mississippian) in south- and southeast-central Kentucky, IN Contributions to stratigraphy, 1965: U.S. Geological Survey Bulletin, 1224-F, p. F1-F38.


Summary:

Named Nada Member of Borden Formation. Consists of clayey and silty shale with minor siltstone. "The shale, which is mostly olive gray, grades into resistant limy siltstone. Nonresistant glauconitic siltstone is also common. The Member ranges from about 30 to 65 ft in thickness." Conformably underlain by Cowbell Member and conformably overlain by Renfro Member of Borden Formation. Age is Early Mississippian.

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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