Mamers Vallis
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| Mamers Vallis | |
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| Coordinates | 40.3° N, 342.2°W |
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| Length | 1,020.0 |
| Naming | Word for "Mars" in Oscan. |
Mamers Vallis is a long, winding canyon in the north of Mars. It covers 1000 km, cutting through the cratered uplands of the Arabia Terra, from the Cerulli Crater to the Deuteronilus Mensae near the edge of Mars' vast northern lowlands. Through its mid-section, it averages a width of 25 km and a depth of 1200 meters.
The most popular theory states that the canyon was likely formed by either water or lava, with the flow from south to north and additional material flowing from the slope toward the valley floor. According to the most popular theory, linear features on the valley bottom indicate possible ice flows and that ice may currently be plentiful. Mamers Vallis is dated to the early Hesperian period, about 3.8 billion years ago.
Mamers Vallis was named in 1976, after the Oscan word for Mars.
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