Sporadic flows that emerge on abrupt slopes on Mars are to be formed by smooth sand and not water as some scientists had formerly conjectured according to a recent research. Assessment of the slopes where the slopes were discovered on Mars depict that they are similar to the size of active dunes, abrupt enough to permit parched grains to condescend with the pull of gravity.
The characteristics were first discovered in images from NASA’s Mars Reconnaissance Orbiter in 2011 as restricted, unilluminated stripe that emerge in summer and die down in winter, then develop again next year. Scientists specified the dark streaks recurring slope lineae, or RSL.
The rovers are absent near the streaks to research on them up close. The scrutiny so far has emerged from apparatuses aboard satellites orbiting Mars. Scientists declared in 2015 that they discovered hydrated salts or perchlorate nearby various intermittent flows. Such minerals can lessen the freezing point of liquid brine, It is a mixture of syrup of water and salt that could momentarily outlast in the exceptionally cold temperatures and depressed air pressure at the Martian surface.
The discovery of perchlorates nearby the dark streaks allowed scientists to propose briny water could percolate up from underground, then flow across slopes and blacken the soil, generating the flows observable in imagery apprehended by MRO’s telescopic HiRISE camera.
Recent study points out to the flowing sand as the probable clarification for the streaks. Colin Dundas, a scientist at the U.S. Geological Survey and lead author of the study published in Nature Geoscience on Nov. 20 said that though we have come to a conclusion of RSL being the probable liquid water flows but the fact is that the slopes are made for dry sand.