According to Science Daily, Geologists have discovered a new type of landform on Mars. They call the landform structures periodic bedrock ridges. They look just like sand dunes but, rather than being made from material piled up by the wind, the ridges actually form from wind erosion of bedrock. Another strange fact about these structures is their creation. They were formed by an unusual form of wind erosion that occurs perpendicular to the prevailing wind instead of in the same direction.
The importance of the discover of these structures is that if the ridges were actually created by wind depositing material into dunes, we won’t be able to get information information from any prior history of the material that is exposed at the surface. These structures are unique to Mars structure because Earth does not have many places where bedrock is exposed with wind as the main source of erosion.
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