Hillery Till Member

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Lithostratigraphy: Banner Formation >>Hillery Till Member
Chronostratigraphy: Cenozoic Erathem >>Quaternary System >>Pleistocene Series

Primary source

Willman, H. B., Elwood Atherton, T. C. Buschbach, Charles Collinson, John C. Frye, M. E. Hopkins, Jerry A. Lineback, and Jack A. Simon, 1975, Handbook of Illinois Stratigraphy: Illinois State Geological Survey Bulletin 95, 261 p.

Contributing author(s)

John C. Frye and H. B. Willman


Original description

Hillery Till Member, Banner Formation (Johnson et al., 1971, p. 195).


Named for Hillery, Vermilion County.

Other names


Type section

Type location

Its type locality is in the Power Plant Section (NW SW SW 21, 20N-12W).

Type author(s)

Type status

Reference section

Reference location

Reference author(s)

Reference status

Stratigraphic relationships

In the Harmattan Strip Mine Section it overlies the Harmattan Till Member and is overlain by the Tilton Till Member.

Extent and thickness

The member is 14 feet thick in the Harmattan Strip Mine Section. It is best known in the Danville area, where it generally rests directly on the bedrock.


The Hillery Till Member is reddish brown, calcareous, massive, hard till. The lower part is slightly darker, and the upper commonly contains streaks of silt.




Well log characteristics


Age and correlation

Environments of deposition

Economic importance



JOHNSON, W. H., D. L. GROSS, and S. R. MORAN, 1971, Till stratigraphy of the Danville region, east-central Illinois, in Till, A Symposium: Ohio State University Press, Columbus, p. 184-216; Illinois State Geological Survey Reprint 1972-I.

ISGS Codes

Stratigraphic Code Geo Unit Designation