1 , D. T. Blewett 2 , B. R. Hawke 3 , and N. C. Richmond 4 , 1 Dept. of Geology and Planetary Science, Univ. of Pittsburgh, Pittsburgh, PA 15260 USA, [email protected]; 2 NovaSol, 733 Bishop St., 28th Floor, Honolulu, HI 96813 USA, [email protected]; 3 Hawaii Inst. of Geophysics and Planetology, Univ. of Hawaii, Honolulu, HI 96822 USA; 4 Inst. of Geophysics and Planetary Physics, Scripps In...