OCT 11, 2017 3:12 PM PDT

MRO Image Offers Potential Clues About the Mechanisms Behind Sand Formation on Mars

WRITTEN BY: Anthony Bouchard

Mars is one of our closest planetary neighbors, and yet we still have so much to learn about it.

One of the questions that planetary scientists have yet to answer all these years is where all of the sand composing Mars’ sand comes from, and thanks to an image snapped by the Context Camera on NASA’s Mars Reconnaissance Orbiter (MRO), we might finally have a lead.

Image Credit: NASA/JPL-Caltech/University of Arizona

The image depicts a sizeable semi-circular depression on Mars’ surface containing sediments of all different colors, and NASA says the darker ones might tell a story that’s instrumental to the planet’s excess of dunes.

Related: Here's why Mars is dry and lifeless today

The space agency explains that the darker sediments are being eroded away by bedrock in the region photographed, and the downslope lineations you see just underneath everything are indicative of a gravitational feed.

As it would seem, this evidence supports the concept that wind alone isn’t responsible for moving the vast amounts of sand that creates the dunes we see on Mars’ surface today. Instead, this erosion process might be behind a lot of it.

Moreover, this sand-formation process could be more widespread and happening from one depression to the next.

NASA goes on to reveal that as sand grains are formed, the wind picks them up and moves them around, wearing them down through a process called comminution. As it happens, the larger-sized sand grains break into smaller ones.

Many of the particles break apart to become so small over time that they have little effect on dune formation. With that in mind, sand formation needs to be a constant process, or else the dunes would cease to exist.

Related: Did previous space rock impacts make Mars more habitable?

We still have much to learn about the Martian surface, but as missions like that of the MRO and Curiosity Rover continue, we will keep collecting valuable data that could answer are seemingly-endless questions.

Source: NASA

About the Author
  • Fascinated by scientific discoveries and media, Anthony found his way here at LabRoots, where he would be able to dabble in the two. Anthony is a technology junkie that has vast experience in computer systems and automobile mechanics, as opposite as those sound.
You May Also Like
OCT 09, 2019
Space & Astronomy
OCT 09, 2019
How Astronomers Determine the Universe's Age
The universe is so old and so large that the Earth is but an insignificant speck of dust by comparison. Astronomers are always trying to make sense of the...
DEC 16, 2019
Space & Astronomy
DEC 16, 2019
Here's What Would Happen if the Earth Stopped Orbiting the Sun
The Earth orbits the Sun once every 365 days, or one full year. It does this while whizzing through the vacuum of space at break-neck speeds of up to 110,0...
DEC 29, 2019
Space & Astronomy
DEC 29, 2019
New Record for Longest Female Spaceflight Set
2019 was chock-full of record-setting precedents for NASA, especially in terms of women’s accomplishments. Perhaps the most substantial of those was...
DEC 29, 2019
Space & Astronomy
DEC 29, 2019
The Dangers of Space Debris Explained
Humankind has become increasingly reliant on satellites and space technology to conduct everyday life, be it GPS for navigation on the road or satellite in...
JAN 06, 2020
Space & Astronomy
JAN 06, 2020
How Much Do You Know About Mars?
Humankind is getting closer to the ultimate goal of sending humans to Mars for scientific research, and then eventually colonization later down the line. B...
JAN 13, 2020
Space & Astronomy
JAN 13, 2020
Lunar Dust is Actually Quite Dangerous to Humans
Most people have a tendency to think that lunar dust isn’t any different than the dirt found here on Earth, but quite the opposite is true. In fact,...
Loading Comments...