LUKENS, William, Department of Geology and Environmental Science, James Madison University, Harrisonburg, VA 22807-1004, PEPPE, Daniel, Baylor UniversityDepartment of Geosciences, 1 Bear Pl Unit 97354, Waco, TX 76798-7354, DEINO, Alan L., Berkeley Geochronology Center, 2455 Ridge Road, Berkeley, CA 94709, FOX, David L., Department of Earth Sciences, University of Minnesota, Minneapolis, MN 55455, BEVERLY, Emily Jane, Department of Earth and Atmospheric Sciences, University of Houston, Houston, TX 77006-1563 and MILLER, Ellen, Department of Anthropology, Wake Forest University, Winston-Salem, NC 27106