Tag Archives: sand

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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HiRISE: Seasonal haloes and fractals

Seasonal haloes and fractals. In the spring, as the winter layer of dry ice covering the polar regions sublimates, there is a lot of action. The ice layer cracks and ruptures, and escaping gas lofts sand from the dunes above … Continue reading

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RSLs are flowing sand, not water?

Dark features previously proposed as evidence for significant liquid water flowing on Mars have now been identified as granular flows, where sand and dust move rather than liquid water, according to a new article published in Nature Geoscience by the … Continue reading

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