Tag Archives: sand dunes

New terrestrial analog for martian megaripple dunes

A new paper [published in Icarus] by M. Foroutan (U. Waterloo, Canada) and co-authors describes the first terrestrial dark sand dunes similar to a type of mysterious dune found on Mars.  These megaripples, found surrounding the remote volcanic caldera Wau-an-Namus, … Continue reading

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THEMIS: Big dunes and little ones in Russell Crater

THEMIS Image of the Day, November 14, 2018. This VIS image shows part of the floor of Russell Crater, including sand dunes of mulitple sizes. Russell Crater is located in Noachis Terra. Do small dunes merge to become big ones? … Continue reading

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HiRISE: Dune field in a crater near Iaxartes Tholus

A dune field in a crater near Iaxartes Tholus. Beautiful Mars series. [More at links]

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HiRISE: Dunes dubbed Furya

Dunes dubbed Furya. Of course, these were dubbed by the suggester of the image, who clearly is a fan of “The Chronicles of Riddick.” Beautiful Mars series. [More at links]

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HiRISE: North flank of Ceti Mensa

The north flank of Ceti Mensa. There is some possible soft-sediment deformation in this area. The region has attracted attention because its deep red color in images collected by the Viking Orbiter mission during the 1970s. Beautiful Mars series. [More … Continue reading

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Seeing Mars in a grain of sand

[Ed. note: The following is a guide to two recent special issues of the Journal of Geophysical Research; both collect papers reporting on studies of the Bagnold Dunes in Gale Crater. The guide complements the MSL report posted earlier here.] … Continue reading

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HiRISE: Colorful impact

Some regions of Mars are not very colorful, but we can be surprised by local features. This image of an impact crater in the south Syrtis Major region was acquired as a “ride-along” with a CRISM observation, which targeted this … Continue reading

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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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HiRISE: Dark dunes in Ius Chasma

Dark dunes in Ius Chasma. This image is part of a campaign to monitor the dunes over three Martian years. Beautiful Mars series. [More at links]

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