1. Planetary Science Institute, Tucson, Arizona, USA.
2. Department of Geology, Gustavus Adolphus College, St. Peter, Minnesota, USA.
3. Utah Geological Survey, Salt Lake City, Utah, USA.
4. Goddard Space Flight Center, Greenbelt, Maryland, USA.
5. Department of Geological Sciences, University of Colorado Boulder, Boulder, Colorado, USA.
6. Department of Earth and Planetary Sciences, University of Tennessee-Knoxville, Knoxville, Tennessee, USA.
7. Framework, Silver Spring, Maryland, USA.
8. USGS, Flagstaff, Arizona, USA.
9. Concordia College, Moorhead, Minnesota, USA.