Ravinia Sand Member
Remarks
The Ravinia Sand Member has been abandoned. The former Ravinia Sand Member is now classified with the Dolton facies of the Henry Formation.
References
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.
ISGS Codes
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