HOWARD, Alan D.1, MORGAN, Alex M.
1, HOBLEY, Daniel E.J.
2, MOORE, Jeffrey M.
3, DIETRICH, William E.
4, WILLIAMS, Rebecca M.E.
5, BURR, Devon M.
6, GRANT, John
7, WILSON, Sharon Purdy
7, and MATSUBARA, Yo
8, (1) Department of Environmental Sciences, University of Virginia, P.O. Box 400123, Clark Hall 205, Charlottesville, VA 22903-3188, ah6p@virginia.edu, (2) Dept of Geological Sciences, University of Colorado, UCB 399, 2200 Colorado Avenue, Boulder, CO 80309-0399, (3) NASA Ames Research Center, Space Science Division, MS-245-3, Moffett Field, CA 95129, (4) Earth and Planetary Science, University of California, UC Berkeley, 307 McCone Hall, Berkeley, CA 94720-4768, (5) Planetary Science Institute, 1700 East Fort Lowell, Suite 106, Tucson, AZ 85719, (6) Earth and Planetary Sciences, University of Tennessee, 306 Earth and Planetary Science Building, 1412 Circle Dr, Knoxville, TN 37996-1410, (7) Center for Earth and Planetary Studies, National Air and Space Museum, Smithsonian Institution, Washington, D. C, DC 20560, (8) Center for Earth and Planetary Studies, National Air and Space Museum, Smithsonian Institution, Washington, DC 20560