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Geologic Unit: Hillery
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Map showing publication footprint
  • Usage in publication:
    • Hillery Till Member
  • Modifications:
    • Named
  • Dominant lithology:
    • Till
    • Silt
    • Sand
  • AAPG geologic province:
    • Illinois basin
Publication:

Johnson, W.H., Gross, D.L., and Moran, S.R., 1971, Till stratigraphy of the Danville region, east-central Illinois, IN Goldthwait, R.P., ed., Till; a symposium: Ohio State University Press, Geological Society of America, North-Central Section meeting, Columbus, OH, 1969, p. 184-216.


Summary:

Hillery Till Member of Banner Formation here named in east-central IL. Described as reddish-brown calcareous, massive till containing silt and sand. 4.3 m thick at type section in Vermilion Co. Overlies Harmattan Till Member (new name) or Pennsylvanian bedrock; underlies Tilton Till Member (new name). Age is Kansan.

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


Map showing publication footprint
  • Usage in publication:
    • Hillery Till Member
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Illinois basin
Publication:

Bleuer, N.K., 1991, The Lafayette bedrock valley system of Indiana; concept, form, and fill stratigraphy, IN Melhorn, W.N., and Kempton, J.P., eds., Geology and hydrogeology of the Teays-Mahomet bedrock valley system: Geological Society of America Special Paper, 258, p. 51-77.


Summary:

Hillery Till Member reassigned to Jessup Formation in IN. "Basic classification is based on mineralogic characteristics indicative of source provinces." Tills of the Jessup Formation were derived from a Grenville source, while tills of the Banner were derived from the Superior province. Hillery is a possible equivalent of the Cloverdale Till Member of western IN.

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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