LILLYDAHL-SCHROEDER, Hosanna G., Deparment of Geosciences, University of Massachusetts, Amherst, MA 01003, DUMOND, Gregory, Earth, Atmospheric, and Planetary Science, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139, MAHAN, Kevin H., Department of Geological Sciences, University of Colorado, Boulder, CO 80309 and BROWN, Laurie L., Department of Geosciences, University of Massachusetts, 611 North Pleasant Street, Amherst, MA 01003-9297, hosanna@student.umass.edu, hosanna@student.umass.edu