Alluvial fans, gently-sloping wedges of sediment deposited by flowing water, seen on Mars : https://t.co/xO1g98wmpa pic.twitter.com/58zG2q1p5L— NASA (@NASA) March 24, 2016
Alluvial fans, gently-sloping wedges of sediment deposited by flowing water, seen on Mars : https://t.co/xO1g98wmpa pic.twitter.com/58zG2q1p5L— NASA (@NASA) March 24, 2016
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