Tag Archives: sand dunes

HiRISE: Down in Proctor Crater

Down in Proctor Crater. Proctor Crater is 168 kilometers in diameter, and its massive dune field has been imaged by us for several years to track changes over time. Beautiful Mars series. [More at links]

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HiRISE: The sand always gets through

The sand always gets through. There are also eroded layers here in Orson Welles Crater. Beautiful Mars series. [More at links]

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‘Ghost dune’ pits discovered on Mars

Scientists have discovered hundreds of crescent-shaped pits on Mars where sand dunes the size of the U.S. Capitol stood billions of years ago. The curves of these ancient dune impressions record the direction of prevailing winds on the Red Planet, … Continue reading

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THEMIS: Active dunes and possible glacier flow

THEMIS Image of the Day, July 6, 2018. This VIS image is located on the floor of an unnamed crater between Terra Sabaea and Utopia Planitia. The center of the image contains several regions of sand dunes. The dunes occupy … Continue reading

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HiRISE: Dune field in crater

Shadow dancing. Sometimes the less said about a picture, the better. Beautiful Mars series. [More at links]

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THEMIS: On the shore of a sea of sand

THEMIS Image of the Day, June 20, 2018. This VIS image shows a small part of the huge northern dune field called Olympia Undae. This dune field surrounds 1/3 of the north polar cap. Collected in northern summer, there is … Continue reading

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THEMIS: Dunes and sand sheet in Rabe Crater

THEMIS Image of the Day, June 19, 2018. The large sand sheet with surface dune forms seen in this VIS image is located on the complex floor of Rabe Crater. The sand is likely derived by erosion into the deposit … Continue reading

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HiRISE: Of dunes and their stories

Of dunes and their stories. So far no seasonal changes have been detected here, making this site unique. Beautiful Mars series. [More at links]

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HiRISE: Once in a blue dune

Sand dunes often accumulate in the floors of craters. In this region of Lyot Crater there is a field of classic barchan dunes. Just to the south of the group of barchan dunes is one large dune with a more … Continue reading

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HiRISE: Dust and frost

Sand dunes in the north polar regions of Mars show light coatings of pale orange dust blown partially across the dark basaltic sand. Around the edges of the dunes, patches of seasonal dry ice remain. These patches will be gone … Continue reading

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