ИСТИНА

Slope streaks are a uniqueactive phenomenon on Mars; they differ from so-calledrecurring slope lineae in their morphology, settingsand mode of occurrence. The mechanism of slope streak formation is not known, but there are two main hypotheses for their origin: "dry", a specific kind of dust avalanchethat has never been observed in terrestrial and laboratory environments, and "wet", a specific kind of percolation of brines in the shallow subsurface. Slope streaks are formed in equatorial regions with relatively steep slopes and high concentrations of dust, which makes landing and roving on them difficult. Therefore, we use remote sensing data to assess the geometric characteristics of slope streaks to distinguish between these two main types of hypotheses for their origin.