Historical:Oakland Till Member

	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
Link	Web page
PDF	PDF file
Store	ISGS Store

	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
Link	Web page
PDF	PDF file
Store	ISGS Store

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

Authors

John C. Frye and H. B. Willman

Name Origin

The Oakland Till Member of the Wedron Formation (Ford, in Johnson et al., 1972, p. 15) is named for Oakland, Coles County, where it is the surface drift.

Type Section

It has been described only from its occurrence in the Harmattan strip mine in Vermilion County (NE NE NW 4, 19N-l2W).

Extent and Thickness

In the Harmattan strip mine it ranges from 0 to more than 30 feet thick.

Stratigraphic Position

It occurs above Robein Silt and is overlain by the Glenburn Till Member.

Description

It is a coarse, blocky, calcareous, brown till containing wood fragments and mollusk shells (dated at 20,800 ± 130 radiocarbon years B.P.; sample ISGS-81). It locally contains thin beds of silt, sand, and gravel at the base.

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.

ISGS Codes

Stratigraphic Code	Geo Unit Designation
0550	t(o)