Researchers have been reasoning what may be causing the dark streaks on some Martian slopes, also known as recurrent slope lineae. While some researchers believe that temporary surface flows of salt water are responsible, others believe that landslides are a more likely explanation. Here’s more information on the findings of a new study of the mysterious dark streaks on Mars.
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NASA believes dark streaks on Mars could be the result of a landslide
For years now, scientists have found clumps of dark, narrow lines that appear on steep, sunny slopes in the warmest areas. Although they appear quarterly, researchers have been studying them for several years. Recent missions to Mars have shown data that there are large pockets of ice beneath the planet.
Previous research has suggested that the dark currents are interesting, an indication that salt water is constantly flowing on the Red Planet in the warmer seasons. In addition, prior work also suggests that warmer temperatures in Martian spring and summer may help generate salty vines. Apparently, the salt vines are able to stay melted in the thin cold air of the Red Planet.
A report in Space.com states that geologists found problems with the idea of brines causing the lineae recycling slope. The angle of the slopes where a recurring slope lineae and its surrounding features are reported is largely inconsistent with the melt flow process. According to a report, the scientists suggest that chemical reaction of Martian surfaces could make it vulnerable to landslides that could explain the recirculation slope.
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In the new study, scientists conducted laboratory experiments on a mixture similar to Martian soil. They freeze and melt the mixtures at the low temperature types found on the Red Planet. The scientists found thin films of slow-moving water formed on the surface of the mineral grains.
The researchers believe that the films could expand and contract over time. This nature of the minerals would lead to turbulence and shortening beneath the Martian surface. Further, wind and dust on the unstable surface are likely to send landslides away, further producing the lines seen on the Red Planet.
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