OSBURN, Magdalena1, SELENSKY, Matthew J.1, MASTERSON, Andrew L.2, TOOMEY III, Rickard S.3, OLSON, Rickard A.4 and OSBURN, Glenn R.5, (1)Department of Earth and Planetary Sciences, Northwestern University, Technological Institute, 2145 Sheridan Road, Evanston, IL 60208, (2)Earth and Planetary Sciences, Northwestern University, 2145 Sheridan Rd, Evanston, IL 60208, (3)Division of Science and Resource Management, Mammoth Cave National Park, Mammoth Cave, KY 42259, (4)Mammoth Cave National Park, P.O. Box 7, Mammoth Cave, KY 42259, (5)Earth and Planetary Sciences, Washington University, St. Louis, MO 63031