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  • Usage in publication:
    • Belvidere Till Member
  • Modifications:
    • Named
  • Dominant lithology:
    • Till
    • Diamict
    • Loam
  • AAPG geologic province:
    • Wisconsin arch
Publication:

Kempton, J.P., Berg, R.C., and Follmer, L.R., 1985, Revision of the stratigraphy and nomenclature of glacial deposits in central northern Illinois, 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. 1-19.


Summary:

The Belvidere Till Member of the Glasford Formation, here named, has been identified in exposures and borings in Boone, De Kalb, McHenry, and Kane Cos., IL. It is a pinkish to tan-brown diamicton with a texture ranging from loam to clay loam to silty clay loam. Overlies the Esmond Till Member of the Glasford, or older deposits where the Esmond is absent; underlies the Nimtz Till Member of the Winnebago Formation. Replaces the Capron Till Member in southern Boone, northern De Kalb, and southwestern McHenry Cos. 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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