Mapping the Northern Plains of Mars: Using Impact Crater Morphologies to Resolve Surface Geology When Contacts are Sparse

RESOLVE SURFACE GEOLOGY WHEN CONTACTS ARE SPARSE. J. A. Skinner, Jr. 1 , T. Platz 2 , M. R. Balme, S. J. Conway, F. Costard, C. Gallagher, S. van Gasselt, E. Hauber, A. E. Johnsson, A. Kereszturi, A. Losiak, C. Orgel, J. D. Ramsdale, D. Reiss, A. Sejourne, Z. Swirad, 1 Astrogeology Science Center, U.S. Geological Survey, 2255 N. Gemini Drive, Flagstaff, AZ, 86001 (jskinner@usgs.gov), 2 Planetary Science Institute, 1700 E. Fort Lowell, Tucson, AZ, 85719.