Title: What Reflectance Spectroscopy can Tell us about Planetary Surfaces and their Evolution Ed Cloutis University of Winnipeg Canada Abstract: Reflectance spectroscopy is a powerful technique for exploring the surficial geology of planetary bodies. This technique is capable of providing information on the following properties of solid surfaces: the presence and nature of amorphous or poorly crystalline phases; analysis of both organic and inorganic components; discriminating structurally distinct but compositionally identical species; the presence and structural state of water; cation site occupancies in minerals; the identity of different anions and anionic groups; the type and abundance of different transition series elements; and, oxidation states of transition series elements. Such information, in turn, enables us to constrain the geological and climatological histories of target bodies. This is due to the fact that spectroscopic analysis can provide insights into the conditions that were present during formation of geological materials and their subsequent modification (if any). Target properties that can be derived from spectroscopic analysis