LEFTWICH, T.E., Ohio Department of Natural Resources, Division of Geological Survey, 2045 Morse Rd Bldg. C-2, Columbus, OH 43229-6693, ANGLE, Michael P., Ohio Department of Natural Resources, Division of Geological Survey, 2045 Morse Rd., C-2, Columbus, OH 43229-6605 and WOLFE, Mark E., Ohio Division of Geological Survey, Ohio Department of Natural Resources, 2048 Morse Rd, Bldg C2, Columbus, OH 43229-6693, tim.leftwich@dnr.state.oh.us