Affiliation: | 1. Department of Geology, 500 Geology/Physics Building, University of Cincinnati, Cincinnati, OH 45221-0013, USA;2. Earth and Environmental Systems Institute, Pennsylvania State University, University Park, PA 16802, USA;3. Department of Environmental Sciences, University of Toledo, Toledo, OH 43606, USA;4. Department of Geosciences, North Dakota State University, P.O. Box 6050, Dept. 2745, Fargo, ND 58108-6050, USA |