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Batestown Member

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Lithostratigraphy: Wedron Group >>Lemont Formation >>Batestown Member
Chronostratigraphy: Cenozoic Erathem >>Quaternary System >>Pleistocene Series


Primary source

Hansel, Ardith K., and W. Hilton Johnson, 1996, Wedron and Mason Groups: Lithostratigraphic Reclassification of Deposits of the Wisconsin Episode, Lake Michigan Lobe Area: Illinois State Geological Survey Bulletin 104, 116 p.

Contributing author(s)

Ardith K. Hansel and W. Hilton Johnson

Name

Original description

Batestown Till Member (Johnson et al. 1971b).

Derivation

Batestown, a village in Vermilion County.

Other names

History/background

The Batestown Till Member of the Wedron Formation was originally defined by Johnson et al. (1971b) and described as a distinct gray till, easily recognized by its texture, structure, and color in the Decatur Sublobe area. It was later correlated regionally and reinterpreted as part of the Lemont Formation.

  • Map showing Quaternary deposits across Illinois and distribution of glacial units.
    Figure 5 -- Areal distribution of the Wedron Formation till members and the Trafalgar Formation (after Lineback 1979).
  • Stratigraphic diagram showing relationships among till members across Illinois sublobes.
    Figure 7 -- History of lithostratigraphic classification of the Wedron Group deposits.
  • Regional diagram showing distribution of glacial deposits across Illinois and surrounding areas.
    Figure 13a -- Areal distribution of moraines and boundaries of formations and predominant members of the Wedron Group and the Trafalgar Formation in Illinois. (Names of formations and members are labeled on 13b.) Sublobe areas of the Lake Michigan Lobe and the Huron-Erie Lobe are shown on inset map: (1) Harvard; (2) Princeton, (3) Joliet; (4) Peoria; (5) Decatur; and (6) Huron-Erie (sublobe areas and moraines are modified from Willman and Frye 1970).
  • Map showing moraine positions and glacial features associated with Batestown Member deposits.
    Figure 13b -- Names of Wedron Group formations and members in Illinois.

In this report, the Batestown Till Member of the Wedron Formation is reclassified as the Batestown Member of the Lemont Formation.

Type section

Type location

Emerald Pond Section near Danville in Vermilion County.

Reference section

Reference location

Higginsville Section; Wedron Section.

  • Geologic section showing stratigraphic relationships of glacial deposits.
    Figure 12 -- Intertongued sorted-sediment units of the Mason Group and diamicton units of the Wedron Group at Wedron Quarry pit 1. Mason Group units are shaded.
  • Diagram illustrating stratigraphic relationships among glacial units.
    Figure 12 Diagram.
  • Section illustrating lithology and boundaries of glacial units.
    Figure 14 -- The Yorkville and Batestown Members of the Lemont Formation, Delavan Member of the Tiskilwa Formation, Robein Member of the Roxana Silt, and Glasford Formation at Higginsville Section.

Stratigraphic relationships

The Batestown Member is the medium-textured, lowermost diamicton unit of the Lemont Formation.

Extent and thickness

Forms a wedge-shaped deposit that overlaps the Tiskilwa Formation.

Lithology

Calcareous gray loam diamicton with lenses of gravel, sand, silt, and clay.

  • Exposure showing medium-textured gray diamicton characteristic of the Batestown Member.
    Figure 23 -- Silt loam diamicton (subglacial till) of the Batestown member of the Lemont Formation.

Contacts

Lower boundary: contact with Tiskilwa Formation or older units. Upper boundary: contact with Yorkville Member or younger deposits.

  • Geologic section showing lower boundary relationships of Batestown Member.
    Figure 24 -- Silty clay diamicton of the Yorkville Member and silt loam diamicton of the Batestown Member (Lemont Formation) overlie clay loam diamicton of the undivided Tiskliwa Formation at Fox River Stone Quarry, St. Charles, Illinois. The diamictons are interpreted to be subglacial tills.
  • Section illustrating contact relationships with adjacent glacial units.
    Figure 25 -- Sorted-sediment tongue of the Equality Formation between diamictons of the Batestown Member of the Lemont Formation and the Piatt Member of the Tiskilwa Formation at Wedron Quarry pit 6.

Age and correlation

Deposited during the Shelby and Putnam Phases of the Michigan Subepisode.

  • Diagram showing timing of glacial phases and ice-margin fluctuations.
    Figure 10 -- Geochronological units, chronostratigraphic units and diachronic units in the Lake Michigan Lobe in a transect from south of Peoria, Illinois, to north of the Straits of Mackinac in Michigan (geochronologic and chronostratigraphic units are after Frye et al. 1968, as modified by Follmer et al. 1979, Curry and Follmer 1992, and Evenson et al. 1976; upper part of time-distance diagram and phases of the Michigan Subepisode are after Hansel and Johnson 1992).
  • Regional correlation diagram linking glacial deposits across the Midwest.
    Figure 11 Correlation of the Wedron Group formations and members in the Lake Michigan Lobe area (units in Wisconsin from Mickelson et. al. 1984, Mickelson and Syverson, in press; units in Indiana from Bleuer et al. 1983, N.K. Bleuer, Indiana Geological Survey, personal communication, 1994; units in Michigan from Monaghan and Larson 1986, Monaghan et al. 1986, Taylor 1990).

Environments of deposition

Subglacial and ice-marginal facies of glacigenic sequences.

Remarks

Reclassified and redescribed unit.

References

HANSEL, A. K., and W. H. JOHNSON, 1992, Fluctuations of the Lake Michigan Lobe during the late Wisconsin Subepisode: Sveriges Geologiska Undersoekning, Series Ca 81, p. 133-144.
JOHNSON, W. H., 1976, Quaternary stratigraphy in Illinois—Status and current problems, in W. C. Mahaney, editor, Quaternary Stratigraphy of North America: Dowden, Hutchinson, & Ross, Inc., Stroudsburg, PA, p. 169- 196.
JOHNSON, W. H., D. L. GROSS, and S. R. MORAN, 1971b, Till stratigraphy of the Danville region, east-central Illinois, in R.P. Goldthwait, J.L. Forsyth, D.L. Gross, and F. Pessl, Jr., editors, Till, A Symposium: Ohio State University Press, Columbus, p. 184-216.
JOHNSON, W. H., and A. K. HANSEL, 1990, Multiple Wisconsinan glacigenic sequences at Wedron, Illinois: Journal of Sedimentary Petrology, v. 60, no. 1, p. 26-41.
JOHNSON, W. H., D. W. MOORE, and E. D. McKAY, III, 1986, Provenance of late Wisconsinan (Woodfordian) till and origin of the Decatur Sublobe, east-central Illinois: Geology Society of America Bulletin, v. 97, no. 9, p. 1098-1105.
KEMPTON, J. P., P. B. DuMONTELLE, and H. D. GLASS, 1971, Subsurface stratigraphy of the Woodfordian tills in the McLean County region, Illinois, in R. P. Goldthwait, J. L. Forsyth, D. L. Gross, and F. Pessl, Jr., editors, Till, A Symposium: Ohio State University Press, Columbus, p. 217-233.
LINEBACK, J. A., 1979, Quaternary Deposits of Illinois (Map): Illinois State Geological Survey, scale 1:500,000.
McKAY, E. D., 1975, Stratigraphy of glacial tills in the Gibson City reentrant, central Illinois: M.S. thesis, University of Illinois at Urbana-Champaign, 59 p.
WICKHAM, J. T., 1979a, Glacial Geology of North-Central and Western Champaign County, Illinois: Illinois State Geological Survey Circular 506, 30 p.
WILLMAN, H. B., and J. C. FRYE, 1970, Pleistocene Stratigraphy of Illinois: Illinois State Geological Survey Bulletin 94, 204 p.

ISGS Codes

ISGS Code and Symbol
Stratigraphic Code Geo Unit Designation

0480

l-b



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