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  • |category6=Non-marine Sand, Clay, and Silt H. B. Willman and John C. Frye
    3 KB (506 words) - 17:34, 21 November 2016
  • |category6=Non-marine Sand, Clay, and Silt ...chbach, Charles Collinson, John C. Frye, M. E. Hopkins, Jerry A. Lineback, and Jack A. Simon, 1975, Handbook of Illinois Stratigraphy: Illinois State Geol
    4 KB (554 words) - 17:11, 11 January 2017