Strange dark streaks on the Martian surface called recurring slope lineae may be caused by salty water forming a crust, which later collapses in a landslide
Source:
https://www.newscientist.com/article/2266632-lines-on-mars-could-be-created-by-salty-water-triggering-landslides/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home