Lee Center Till Member
The Lee Center Till Member is now classified as the Glasford Formation (Berg et al. 1985).
BERG, R. C., J. P. KEMPTON, L. R. FOLLMER, and D .P. McKENNA, 1985, Illinoian and Wisconsinan Stratigraphy and Environments in Northern Illinois— The Altonian Revised: Illinois State Geological Survey Guidebook 19, 177 p.
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