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Seasonal flows on warm Martian slopes 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.
The flows are narrow and exhibit relatively dark markings on steep 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, or interactions between sulfates and chlorine salts that interact under to produce landslides.
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