Historical:Kellerville Till Member

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Pleistocene stratigraphy of Illinois
Series Bulletin 94
Author H. B. Willman and John C. Frye
Date 1970
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Lithostratigraphy: Glasford Formation >>Kellerville Till Member
Chronostratigraphy: Cenozoic Erathem >>Quaternary System >>Pleistocene Series

Authors

H. B. Willman and John C. Frye

Name origin

The Kellerville Till Member of the Glasford Formation is named for Kellerville, Adams County.

Other names

The name Kellerville replaces the terms Mendon Till (Frye, Willman, and Glass, 1964; Frye et al., 1969) and Payson Till (Leighton and Willman, 1950; Wanless, 1957).

Type section

The Kellerville Till Member is named for roadcut exposures 2 miles southwest of Kellerville in the Washington Grove School Section (table 6), NW NW SW Sec. 11, T. 2 S., R. 5 W. The Kellerville Till is also described in the Cottonwood School, Enion, and Tindall School Sections (table 6).

Table 6 -- Stratigraphic Sections (partial)
The following 21 stratigraphic sections describe exposures in Illinois and illustrate many of the aspects of Pleistocene stratigraphy. These sections contain the type localities for 21 rock-stratigraphic units, 4 soil-stratigraphic units, and 3 time-stratigraphic units and include paratypes for several other units. The sample numbers preceded by "P" are the numbers used in the Illinois State Geological Survey collections. Analytical data on many of these samples are on file at the Survey. The sections are arrange alphabetically by name.

Stratigraphic relationships

The Kellerville Till is bounded at the base by the Petersburg Silt or, in its absence, by the top of the Yarmouth Soil. Its upper limit is the top of the Pike Soil (New Salem Northeast, Pleasant Grove Sections, table 6), the Duncan Mills Member, the Teneriffe Silt, or younger stratigraphic units.

Table 6 -- Stratigraphic Sections (partial)
The following 21 stratigraphic sections describe exposures in Illinois and illustrate many of the aspects of Pleistocene stratigraphy. These sections contain the type localities for 21 rock-stratigraphic units, 4 soil-stratigraphic units, and 3 time-stratigraphic units and include paratypes for several other units. The sample numbers preceded by "P" are the numbers used in the Illinois State Geological Survey collections. Analytical data on many of these samples are on file at the Survey. The sections are arrange alphabetically by name.

Extent and thickness

It is as much as 150 feet thick in the deeper bedrock valleys, but it more commonly is 50 to 100 feet thick. Its geographic extent is shown in figure 6, and its spatial relationship is indicated diagrammatically in figure 7.

Lithology

The member consists of till with intercalated discontinuous zones of sand and gravel outwash and silt; it is more variable than the overlying tills and commonly has a significantly higher percentage of expandable clay minerals. The grain-size and clay mineral composition of the matrix is given in tables 2 and 5, and the average of heavy mineral analyses is given in table 4.

Age and correlation

The member is in the upper part of the Liman Substage of the Illinoian Stage. The till was deposited by the westernmost extension of the Lake Michigan Lobe.

References

FRYE, J. C., H. D. GLASS, J. P. KEMPTON and H. B. WILLMAN, 1969, Glacial tills of northwestern Illinois; Illinois State Geological Survey Circular 437, 47 p.
FRYE, J. C., H. B. WILLMAN, and H. D. GLASS, 1964, Cretaceous deposits and the Illinoian glacial boundary in western Illinois: Illinois State Geological Survey Circular 364, p. 28.
LEIGHTON, M. M., and H. B. WILLMAN, 1950, Loess formations of the Mississippi Valley: Journal of Geology, v. 58, no. 6, p. 599-623. (Reprinted as Illinois State Geological Survey Report of Investigations 149)
WANLESS, H. R., 1957, Geology and mineral resources of the Beardstown, Glasford, Havana, and Vermont Quadrangles: Illinois Geological Survey Bulletin 82, 233 p.

ISGS Codes

Stratigraphic Code Geo Unit Designation
0970
g-kw