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Seasonal flows on warm Martian slopes
Surface features on Mars / From Wikipedia, the free encyclopedia
Seasonal flows on warm Martian slopes (also called recurring slope lineae, recurrent slope lineae and RSL)[1][2] are thought to be salty water flows occurring during the warmest months on Mars, or alternatively, dry grains that "flow" downslope of at least 27 degrees.
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The flows are narrow (0.5 to 5 meters) and exhibit relatively dark markings on steep (25° to 40°) slopes, appear and incrementally grow during warm seasons and fade in cold seasons. Liquid brines near the surface have been proposed to explain this activity,[3] or interactions between sulfates and chlorine salts that interact under to produce landslides.[4]