Historical:Tilton Till Member

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Handbook of Illinois Stratigraphy
Series Bulletin 95
Author H. B. Willman, Elwood Atherton, T. C. Buschbach, Charles Collinson, John C. Frye, M. E. Hopkins, Jerry A. Lineback, Jack A. Simon
Date 1975
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Lithostratigraphy: Banner Formation >>Tilton Till Member
Chronostratigraphy: Cenozoic Erathem >>Quaternary System >>Pleistocene Series


John C. Frye and H. B. Willman

Name Origin

The Tilton Till Member of the Banner Formation (Johnson et al., 1971, p. 196) is named for Tilton, Vermilion County.

Type Section

The type locality is the School House Branch Section (SE NE NE 2, 19N-12W).

Extent and Thickness

In Vermilion County the member is about 15 feet thick.

Stratigraphic Position

The Tilton Till is commonly overlain at the top by a truncated weathered zone, or an oxidized zone, and in the Harmattan Strip Mine Section it overlies the Hillery Till Member.


Where unoxidized, the Tilton Till Member is gray, calcareous, hard, silty, sandy till. The unit contains considerable silt, sand, and gravel, particularly near the upper and lower boundaries.


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