THOMPSON, Todd A., Indiana Geological Survey, Indiana University, 611 North Walnut Grove, Bloomington, IN 47405-2208, LEPPER, Kenneth, Department of Geosciences, North Dakota State University, P.O. Box 6050, Dept. 2745, Fargo, ND 58108-6050, JOHNSTON, John W., Department of Geography and Environmental Studies, Wilfrid Laurier University, 75 University Avenue West, Waterloo, ON N2L 3C5, Canada, BAEDKE, Steve J., Geology and Environmental Science, James Madison University, 395 S. High Street; MSC 6903, Harrisonburg, VA 22807, ARGYILAN, Erin P., Dept. of Geosciences, Indiana University Northwest, 3400 W. Broadway, Gary, IN 46408, BOOTH, Robert K., Earth & Environmental Science, Lehigh University, 1 West Packer Avenue, Bethlehem, PA 18015, ENDRES, Anthony L., Department of Earth Sciences, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada and WILCOX, Douglas A., Environmental Science and Biology, SUNY-Brockport, 350 New Campus Drive, Brockport, NY 14420, tthomps@indiana.edu, tthomps@indiana.edu