Reverse fans?
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by
Simonp
These marks look as though they have a "blob" origin, and then a tail getting more diffuse downwind. In one case, upper right it looks as though there may be a blob following the contour of a sharp feature, but it could just be shadow.
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by
omegarod
I take these to be fans, but with heavier material being deposited closer to the geyser, and then lighter material carried further downwind.
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