Tag Archives: sand

HiRISE: Summit dunes and their sand sources

The ultimate origin of the sediment that forms Martian dunes has long been debated. While sand dunes on Earth are primarily sourced by quartz-bearing components of granitic continental crust, it’s often suggested that sand on Mars derives from eroded volcanic … Continue reading

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THEMIS: North polar dunes meet Escorial Crater

THEMIS Image of the Day, September 25, 2018. At the bottom of this image is Escorial Crater. The dune field to the north are called Hyperboreae Undae. The subtle blue and yellow arcs over the crater are clouds. The THEMIS … Continue reading

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Bagnold Dunes sand movement observed by Curiosity

[Editor’s note: From a paper by Mariah Baker and nine co-authors recently published in Geophysical Research Letters.] The Bagnold Dunes in Southern Summer: Active Sediment Transport on Mars Observed by the Curiosity Rover •  Curiosity’s imaging campaigns in the Bagnold … Continue reading

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THEMIS: Dunes of Moreux Crater

THEMIS Image of the Day, July 31, 2018. Today’s VIS image shows part of the floor of Moreux Crater. Sand dunes are found in this region of the crater floor. Moreux Crater is located on the northern margin of Terra … Continue reading

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HiRISE: The bedforms, they are a-changin’

The bedforms, they are a-changin’. This is in Zephyria Planum. 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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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: Of sand, rock, and dust

Of sand, rock, and dust. There is some wonderful stratigraphy on display here in Meridiani Planum. Beautiful Mars series. [More at links]

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THEMIS: Wind, dust, and gravity in Medusae Fossae

THEMIS Image of the Day, April 10, 2018. This VIS image is located in Medusae Fossae. Along the cliffside several dark streaks are visible. It is thought that these streaks mark the location where downslope movement of material has removed … Continue reading

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HiRISE: Horse playing the flute

Horse playing the flute. Maybe you can see a horse playing a flute here, but really this is a portion of the floor of Eberswalde Crater, at one time candidate landing site for the Mars Science Laboratory.  The light-toned bedrock … Continue reading

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