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Geologic Units: Fairdale
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  • Usage in publication:
    • Fairdale Till Member
  • Modifications:
    • Named
  • Dominant lithology:
    • Till
    • Diamict
  • AAPG geologic province:
    • Wisconsin arch
Publication:

Kempton, J.P., and Berg, R.C., 1985, Stratigraphy of the Oregon Till Member silty facies and Fairdale Till Member, IN Berg, R.C., and others, leaders, Illinoian and Wisconsinan stratigraphy and environments in northern Illinois; the Altonian revisited: Illinois Geological Survey Guidebook Series, Midwest Friends of the Pleistocene, 32nd Annual Field Conference, 1985, no. 19, p. 132-154.


Summary:

The recognition of the Esmond Till as a member of the Glasford Formation (Illinoian) rather than of the Wedron Formation (Wisconsinan) has left three unnamed till members below the Esmond. The middle member is here named the Fairdale Till Member of the Glasford Formation in De Kalb, Boone, Ogle, and Kane Counties, IL. It is a yellowish-brown, sandy loam diamicton. Overlies the Herbert Till Member; underlies the Oregon Till Member silty facies in a stratigraphic relationship similar to that between the Argyle and Capron Till Members of the Winnebago Formation, with which the diamictons were previously correlated. Thickness is less than 10 m. Age is Pleistocene (Illinoian).

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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