Alluvial Fans in Saheki Crater, Mars On 24/03/2016 By MikaelaIn NASA Image of the Day Alluvial fans are gently-sloping wedges of sediments deposited by flowing water. Some of the best-preserved alluvial fans on Mars are in Saheki Crater, an area that has been imaged many times previously. via NASA http://ift.tt/1UKgLwX Share thisFacebookPocketWhatsAppTumblr Related