Tag Archives: dunes

HiRISE: Barchan Pac-Man

Posted on May 16, 2018 by rburnham

Barchan sand dunes are common on Mars and often form vast dune fields within very large (tens to hundreds of kilometers) impact basins. The regions upwind of barchans are usually devoid of sandy bedforms, so if you were walking in … Continue reading →

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HiRISE: Pettit Crater wind streak and intracrater dunes

Posted on May 7, 2018 by rburnham

Pettit Crater wind streak and intracrater dunes. Part of the rationale for this observation is to look for dune bedforms that may be related to thermal inertia and particle mobility. This crater was named after Edison Pettit, an American astronomer (1890–1962). … Continue reading →

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THEMIS: Juventae Chasma’s rubble collection

Posted on May 1, 2018 by rburnham

THEMIS Image of the Day, May 1, 2018. This VIS image runs from northern Juventae Chasma to just short of the southern canyon wall. Illustrating the variety of landforms within the chasma, this image contains the rough canyon floor at … Continue reading →

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HiRISE: Dunes in slow motion

Posted on May 1, 2018 by rburnham

Dunes in slow motion. These almost look like waves. Beautiful Mars series. [More at links]

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HiRISE: Channeled southern highlands

Posted on April 30, 2018 by rburnham

This enhanced color image shows the heavily channeled and ancient southern highlands of Mars. The elongated and jagged features are windblown dunes, perhaps hardened and eroded. [More at link]

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HiRISE: Tracking dune-alcove changes within Chasma Boreale dunes

Posted on April 30, 2018 by rburnham

Tracking dune-alcove changes within Chasma Boreale dunes. Beautiful Mars series. [More at links]

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HiRISE: Frosted dunes in north polar region

Posted on April 16, 2018 by rburnham

A soothing way to start your Monday. These polar dunes show both carbon dioxide frost (the while colored areas) along with darker material that’s been exposed due to sublimation, and is blown by the wind to form these dark spots. … Continue reading →

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HiRISE: Dunes in western Medusae Fossae

Posted on April 13, 2018 by rburnham

Dunes in western Medusae Fossae. These dark dunes in the western Medusae Fossae Formation provide some evidence of being derived locally, probably coming from the north and because of the wind. Beautiful Mars series.

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THEMIS: Dunes and creeping ground in Lyot Crater

Posted on April 11, 2018 by rburnham

THEMIS Image of the Day, April 11, 2018. Lyot Crater is a large, complex crater in the northern lowlands of Vastitas Borealis. This image is located along the southern rim of the crater and shows part of the dune fields … Continue reading →

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HiRISE: Gullies of Matara Crater

Posted on April 6, 2018 by rburnham

Gullies on Martian sand dunes, like these in Matara Crater, have been very active, with many flows in the last ten years. The flows typically occur when seasonal frost is present. Here, we see frost in and around two gullies, … Continue reading →

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