Monthly Archives: May 2013

Well-rounded pebbles in Gale Crater’s rocks point to longtime stream flow

Mars Science Laboratory rover Curiosity landed in Gale Crater at a feature called Bradbury Rise, which lies near the far end of the Peace Vallis alluvial fan. The fan is a broad, flat deposit of sand, gravel, and pebbles washed … Continue reading

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Aeolis Serpens, Mars’ longest sinuous ridge, is an ancient riverbed

A linear ridge that winds for more than 200 kilometers (120 miles) through part of South Australia was a river channel roughly 10 million years ago. After the paleoriver stopped flowing, silica-rich groundwater seeped into the riverbed, cementing its sediments.

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