Mars Salt Deposits
Mars Location This false-color image taken by Mars Rover Spirit's panoramic camera (Pancam) shows salt deposits on the basin floor of Gusev Crater. These salts may record the past presence of water on Mars, as they are most easily mobilized and concentrated in a liquid solution. (Image credit: NASA/JPL/Cornell)
Earth Salt Deposits
Earth Analog This image shows evaporite deposits near springs in the region of Cuatrocienegas, Mexico. Evaporites are sediments that form from the evaporation of saline water. (Image credit: John W. Holt, Institute for Geophysics, University of Texas)

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