Dr. Paul V. Johnson from the Jet Propulsion Laboratory is a planetary scientist interested in the chemical composition of the surface and subsurface of icy ocean worlds and its relationship to assessing habitability. Dr. Johnson will present a body of work examining what salt minerals form when putative Europan ocean fluids are frozen, and how that can provide meaningful linkages between surface and ocean chemistries. Here, experiments are restricted to brines containing Na+, Mg+, Cl-, and SO42- which are among the ions expected to be in abundance within the ocean based on geochemical models. Results presented will relate what salt minerals are formed, along with their hydration state, given the composition of the parent brine and the conditions under which they freeze. It will be shown that salt hydrate glasses (amorphous, non-crystalline solids) can form under certain conditions and that their potential presence on the surface of Europa has implications for how we search for life in the subsurface ocean.