1. Geology, Geophysics and Geochemistry Laboratory NASA Goddard Space Flight Center Greenbelt MD USA
2. Department of Geology University of Maryland College Park MD USA
3. Cryospheric Science Laboratory NASA Goddard Space Flight Center Greenbelt MD USA
4. Earth SYstem Science Interdisciplinary Center University of Maryland College Park MD USA
5. Geosciences Department, Warner College of Natural Resources Colorado State University Fort Collins CO USA