A PHOTO: Once in a Blue Dune Author AlexPublished on June 20, 2018 Sand dunes often accumulate in the floors of craters. In this region of Lyot Crater, NASA's Mars Reconnaissance Orbiter (MRO) shows a field of classic barchan dunes on Jan. 24, 2018. via NASA https://ift.tt/2M9bzkO Share this:MastodonEmailLike this:Like Loading... Related posts: A PHOTO: Gullies of Matara Crater A PHOTO: Panorama with Active Linear Dune in Gale Crater, Mars A PHOTO: Full-Circle Vista With a Linear Shaped Martian Sand Dune A PHOTO: Tangled Up in Blue