Planetary Science Institute, 1700 E. Fort Lowell Rd, Suite 106, Tucson, AZ 85719; Black Hills State University, Science Department, Spearfish, SD 57783, USA
University of Pittsburgh, Department of Geology and Planetary Science, Pittsburgh, PA 15260, USA
Planetary Science Institute, 1700 E. Fort Lowell Rd, Suite 106, Tucson, AZ 85719
U.S. Geological Survey, Astrogeology Team, Flagstaff, AZ 86001, USA
Proxemy Research, 20528 Farcroft Lane, Laytonsville, MD 20882, USA