Tag Archives: eolian processes

HiRISE: Wrinkles in rock

The bedrock in this region of Arabia Terra has been worn away by the wind, revealing their internal structure and geologic history. The wavy lines are individual layers of sand and dust, originally laid down as the bedrock was forming. … 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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Turbulent winds excavated sediments from Gale Crater, leaving offset mound

By seeing which way the wind blows, a University of Texas at Dallas fluid dynamics expert has helped propose a solution to a Martian mountain mystery. Dr. William Anderson, an assistant professor of mechanical engineering in the Erik Jonsson School … Continue reading

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HiRISE: A highly disrupted crater

This 2.5-kilometer diameter crater has been significantly altered from the usual bowl-shaped appearance we associate with craters. Material has covered significant portions of the ejecta and filled in the crater. This fill material has since been subject to erosion—like boulders … Continue reading

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HRSC: Colorful dunes on wind-swept Mars

Dunes are prominent indicators of prevailing winds, as can be seen on this crater floor on Mars, imaged by ESA’s Mars Express on 16 May. Depressions such as impact craters can act as traps for sediments that have been blown … Continue reading

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HiRISE: Opposing dunes, opposing winds

On one side of this image, fairly textbook-looking barchan sand dunes sit atop the bedrock. Barchan dunes pointing in the opposite direction are just a few kilometers away to the east. In between these opposing barchan dunes are star dunes. … Continue reading

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THEMIS: Wind erosion on Hebes Mensa

THEMIS Image of the Day, August 17, 2017. The large mesa in the center of Hebes Chasma dominates this image. The top of the mesa is at the center of the image, with the cliff faces to the top and … Continue reading

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HiRISE: Monitoring sand sheets and dunes

This crater features sand dunes and sand sheets on its floor. What are sand sheets? Snow fall on Earth is a good example of sand sheets: when it snows, the ground gets blanketed with up to a few meters of … Continue reading

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HiRISE: Dark sediments in the Medusae Fossae Formation

Dark sediments in the Medusae Fossae Formation. Beautiful Mars series.

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HiRISE: Bedrock outcrops in Kaiser Crater

This enhanced-color image shows a patch of well-exposed bedrock on the floor of Kaiser Crater. The wind has stripped off the overlying soil, and created grooves and scallops in the bedrock. The narrow linear ridges are fractures that have been … Continue reading

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