Location of the Mars Desert Research Station habitat and our study area, including 11 collection sites (orange dots, ten are from 2014, one is from 2015), northwest of Hanksville, Utah, U.S.A. Inset map of Utah at top right indicates extent of map (smaller white outlined area). Map data courtesy of Google, SIO, NOAA, U.S. Navy, NGA, GEBCO, and Landsat.