Possible Canal/Canyon
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On the right hand side, there is a pattern that follows along with the "veins" of the planet, which could possibly be a deep channel.
Also, in the blotch section at the bottom and the two fan sections on the left-hand side you can see spots where there isn't any dust, but in the "Canyon" on the right-hand side, the blotch doesn't have any noticeable spots.Posted