DEGRADATION HISTORY OF HOMESTEAD HOLLOW. S. A. Wilson1, N. H. Warner2, J. A. Grant1, M. P. Golombek3, A. DeMott2, M. Kopp2, L. Berger3, C. M. Weitz4, E. Hauber5, V. Ansan6, C. Charalambous7, N. Williams3, F. Calef4, T. Pike7, H. Lethcoe3, and R. Hausmann3, 1Center for Earth and Planetary Studies, National Air and Space Museum, Smithsonian Institution, 6th at Independence SW, Washington, DC, 20560 (wilsons@si.edu), 2SUNY Geneseo, Department of Geological Sciences, 1 College Circle, Geneseo, NY 14454, 3Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, 4Planetary Science Institute, 1700 East Fort Lowell, Tucson, AZ, 85719, 5German Aerospace Center (DLR), Institute of Planetary Research, 6University of Nantes, Laboratory of Planetary and Geodynamics, 7Imperial College, London, Department of Electrical and Electronic Engineering.