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Lithostratigraphy
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Chronostratigraphy
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Allostratigraphy
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Hydrostratigraphy
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Primary source

Willman, H. B., and John C. Frye, 1970, Pleistocene Stratigraphy of Illinois: Illinois State Geological Survey Bulletin 94, 204 p.

Contributing author(s)

H. B. Willman and John C. Frye

Name

Original description

Kellerville Till Member, Glasford Formation (Willman and Frye 1970).

Derivation

The Kellerville Till Member 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).

History/background

Type section

Type location

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). <center> '''Table 6 -- Stratigraphic Sections (partial)''' <gallery widths=250px heights=250px perrow=4> File:94-tb_6-b.jpg|alt=Stratigraphic section table showing Illinois exposures and analytical sample data.|{{File:94-tb_6-b.jpg}} File:94-tb_6-c.jpg|alt=Stratigraphic section table illustrating regional stratigraphic variation.|{{File:94-tb_6-c.jpg}} File:94-tb_6-d.jpg|alt=Stratigraphic section table documenting field observations and sample data.|{{File:94-tb_6-d.jpg}} File:94-tb_6-e.jpg|alt=Stratigraphic section table showing detailed Illinois stratigraphic records.|{{File:94-tb_6-e.jpg}} File:94-tb_6-i.jpg|alt=Stratigraphic section table summarizing stratigraphic data across locations.|{{File:94-tb_6-i.jpg}} File:94-tb_6-j.jpg|alt=Stratigraphic section table presenting analytical results.|{{File:94-tb_6-j.jpg}} File:94-tb_6-k.jpg|alt=Stratigraphic section table documenting additional Illinois stratigraphic sections.|{{File:94-tb_6-k.jpg}} </gallery> </center>

Type author(s)

Type status

Reference section

Reference location

Reference author(s)

Reference status

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. <center> '''Additional stratigraphic sections''' <gallery widths=250px heights=250px perrow=4> File:94-tb_6-g.jpg|alt=Stratigraphic section table presenting analytical results.|{{File:94-tb_6-g.jpg}} File:94-tb_6-h.jpg|alt=Stratigraphic section table showing exposures and sample descriptions.|{{File:94-tb_6-h.jpg}} </gallery> </center>

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. <center> <gallery widths=250px heights=250px perrow=4> File:94-fig_6.jpg|alt=Map showing geographic distribution of the Kellerville Till Member in Illinois.|{{File:94-fig_6.jpg}} File:94-fig_7.jpg|alt=Diagram showing stratigraphic relationships of Kellerville Till Member and associated units.|{{File:94-fig_7.jpg}} </gallery> </center>

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. <center> <gallery widths=250px heights=250px perrow=4> File:94-tb_2.jpg|alt=Table showing grain size and composition of glacial till deposits.|{{File:94-tb_2.jpg}} File:94-tb_4.jpg|alt=Table summarizing heavy mineral analysis of glacial deposits.|{{File:94-tb_4.jpg}} </gallery> </center> <center> '''Selected analyses from stratigraphic sections''' <gallery widths=250px heights=250px perrow=4> File:94-tb_5-e.jpg|alt=Table showing mineralogical analysis data for glacial deposits.|{{File:94-tb_5-e.jpg}} </gallery> </center>

Core(s)

Photograph(s)

Contacts

Well log characteristics

Fossils

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.

Environments of deposition

Economic importance

Remarks

Reference(s)

place a <pre> </pre>at the end of a line to get a line return 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.

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