Meldinoor writes:
Considering that the planet does not have an atmosphere allowing liquid water, and does not have significant tectonic or volcanic activity, one would be hard pressed to suppose that cataclysmic events on Mars could have caused so much planetary scarring in such short time,
NASA -
Lava likely made river-like channel on Mars
Interesting article from NASA on this topic. Looks like a volcanic eruption is at least responsible for SOME of the geography on Mars, although scientists haven't ruled out water over time producing some of it either. I don't have much of an opinion at this time one way or another but this article is interesting.
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