Historical:Harmattan 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 >>Harmattan Till Member
Chronostratigraphy: Cenozoic Erathem >>Quaternary System >>Pleistocene Series

Authors

John C. Frye and H. B. Willman

Name Origin

The Harmattan Till Member of the Banner Formation (Johnson et al., 1971, p. 194) is named for the Harmattan Strip Mine near Danville, Vermilion County (NE 4, 19N-12W).

Type Section

The type section is in the Harmattan Strip Mine near Danville, Vermilion County (NE 4, 19N-12W).

Extent and Thickness

In the type area it is 8 feet thick, and it is known definitely only in the Danville area.

Stratigraphic Position

It is bounded at the base by the Belgium Member, or bedrock, and at the top by the Hillery Till Member.

Description

The member is largely gray, calcareous, dense, hard till, but the upper part contains lenticular bodies of gravelly sand.

References

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
1080
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