Contact: Tom Parisi
Northern Illinois University
Caption: This is a global map depicting the dissection density of valley networks on Mars, in relation to the hypothesized northern ocean. Two candidate sea levels are shown: contact 1 with mean elevation at -1,680 meters and contact 2 with mean elevation of -3,760 meters.
Credit: Wei Luo, Northern Illinois University
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Related news release: New computer-developed map shows more extensive valley network on Mars