- My overarching research theme continues to be geological processes that have affected the terrestrial planets. I have continued studies of water on Mars through hydrologic, geologic, and geomorphic analyses of the valley networks and deltas. A second main area of research involves the geochemical history of Mars. Recent field campaigns to Central American volcanoes were completed to assess the geochemical pathways of chemical alteration and microbiology. We are also completing laboratory experiments and geochemical modeling that represent this natural system and similar environments on Mars. Planetary geologic mapping represents another area of research. I have expanded my research directions into microbiology of extremophiles and unmanned aerial surveys (UAS/drone) of Mars analog field sites, enabled by new grant awards from CU in 2018. I also co-led Mars analog fieldwork in Patagonia in Sept. 2018 and ended the year in Antarctica collecting meteorites for NASA.