1. Department of Geology; University of Georgia; 210 Field Street, 306 Geography-Geology Building Athens GA 30602 USA
2. Department of Geosciences; Western Michigan University; 1903 W. Michigan Avenue, 1187 Rood Hall Kalamazoo MI 49008 USA
3. Department of Geography; Kuwait University; Kuwait Kuwait
4. Argonne National Laboratory; Argonne IL USA