Historical:Snider Till Member

Lithostratigraphy: Snider Till Member
Chronostratigraphy: Cenozoic Erathem >>Quaternary System >>Pleistocene Series

Authors

John C. Frye and H. B. Willman

Name Origin

The Snider Till Member of the Wedron Formation (Johnson et al., 1971, p. 204) is named for Snider, Vermilion County.

Type Section

The type section is in the Emerald Pond Section (NE SW SW 33, 20N-12W) (Johnson et al., 1972, p. 42).

Extent and Thickness

In the type section the member is 16 feet thick.

Stratigraphic Position

It occurs in central eastern Illinois (fig. Q-5), where it overlies the Batestown Till Member and is commonly overlain by thin Richland Loess. The uppermost part of the Snider Till is leached and within the B-horizon of the Modern Soil.

Fig. Q-5 -- Areal distribution of the dominantly till formations and members of Illinois (after Willman and Frye, 1970; Johnson et al., 1972).

Description

In the type section, it consists of light olive-brown to gray-brown, calcareous, blocky, jointed, clayey till and a basal zone of silt, sand, and gravel.

References

JOHNSON, W. H., L. R. FOLLMER, D. L. GROSS, and A. M. JACOBS, 1972, Pleistocene stratigraphy of east-central Illinois: Illinois State Geological Survey Guidebook Series 9, 97 p.
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. p. 184-216; Illinois State Geological Survey Reprint 1972-I.

ISGS Codes

Stratigraphic Code	Geo Unit Designation
0450	--