E. D. McKay
Extent and thickness
Well log characteristics
Age and correlation
Environments of deposition
Possibly facies of Hillery or Harmattan Member
McKAY, E. D., 1979, Stratigraphy of Wisconsinan and Older Loesses in Southwestern Illinois: In J. D. Treworgy, E. D. McKay, and J. T. Wickham, eds., 43rd Annual Tri-State Geological Field Conference, Guidebook 14, Illinois State Geological Survey.
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