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Originally posted by ArMaP
From what I have seen, although the winds on Mars are fast, the fact that the atmosphere is thinner makes them weaker than the winds on Earth, so they move less sand than "our" winds, so those tracks can be older than they should be to look like that on Earth.
And an irregular object can move in a straight line if part of the irregularities make them move to the right and the other part make it move to the left, the sum of the movements make it move in a straight line.
Originally posted by BigC2012
The pattern suggests the rock is either rolling or shuffling along can you tell how sloped the land is there?