Key Takeaways
1. Mars Express has been studying the Martian terrain since 2003, revealing unique geological features.
2. Powerful Martian winds have shaped ridges, creating yardangs through the erosion of softer sedimentary rock.
3. The uniform direction of the yardangs indicates the prevailing wind patterns on Mars.
4. The image also shows platy flow, which is formed by cooled lava, suggesting complex geological processes.
5. The relationship between yardangs and platy flow indicates that yardangs are a more recent geological feature on Mars.
Mars Express has been surveying the Martian terrain since the year 2003, uncovering many striking features. A recent image reveals the intense sandblasting occurring on the Red Planet, taken by the High Resolution Stereo Camera (HRSC) that is part of the orbiter.
Distinctive Features of the Martian Surface
The image showcases ridges located on the left side of a relatively new impact crater. These ridges were shaped by powerful Martian winds. The strong gusts lifted sand particles and propelled them against the sedimentary rock, eroding the softer layers while leaving the tougher ones intact. This process led to the creation of the unique sculptures visible in the picture, known as yardangs.
Direction of the Winds
All of the yardangs are angled in the same direction, allowing scientists to infer the direction of the prevailing winds. However, the value of this observation extends beyond just wind direction, providing additional intriguing insights for researchers.
The image displays three distinct formations: the yardangs, an impact crater, and a phenomenon referred to as “platy flow.” The platy flow is less prominent but formed when lava cooled on the surface while still flowing underneath. This persistent flow fractured the surface into rigid plates that shifted similarly to ice floes found on Earth.
Recent Geological Activity
Interestingly, the platy flow is situated both beside and beneath the yardangs, leading scientists to believe that the yardangs were formed atop the platy flow. This indicates that the yardangs are likely a more recent geological development.
Images like this are aiding scientists in gaining a deeper insight into Mars. The information gathered could be vital for upcoming missions that aim to send humans to the Red Planet.
Source:
Link