The complex region of channels at the top of this VIS image are lava channels. These channels are called Olymipca Fossae.
Photo credit: NASA/JPL/Arizona State University
Note: The whitish ground to the left of the medium-sized crater is a windstreak; presumably, all the black marks south of the fossae are windstreaks as well, although the sources for those streaks are not as clear as it is for the dust and sand that comes from the crater.
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