Tag Archives: eolian processes

HiRISE: Opposing dunes, opposing winds

Posted on September 5, 2017 by rburnham

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

Posted on August 17, 2017 by rburnham

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

Posted on June 12, 2017 by rburnham

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

Posted on June 7, 2017 by rburnham

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

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HiRISE: Bedrock outcrops in Kaiser Crater

Posted on March 13, 2017 by rburnham

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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Mars winds carve mountains, move & raise dust

Posted on February 27, 2017 by rburnham

On Mars, wind rules. Wind has been shaping the Red Planet’s landscapes for billions of years and continues to do so today. Studies using both a NASA orbiter and a rover reveal its effects on scales grand to tiny on … Continue reading →

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HiRISE: Aeolian erosion textures near Cerberus Fossae

Posted on February 27, 2017 by rburnham

Aeolian erosion textures near Cerberus Fossae. Beautiful Mars series.

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HiRISE: Craters on a crater’s floor

Posted on February 14, 2017 by rburnham

Craters on a crater’s floor. Beautiful Mars series.

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HiRISE: Soffen Crater floor

Posted on December 23, 2016 by rburnham

Dr. Gerald A. Soffen (February 7, 1926 — November 22, 2000) was a project scientist for the NASA’s Viking program of Mars landers. This crater on Mars was named after him, and this image covers a small portion of the … Continue reading →

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THEMIS: Windstreak on Daedalia Planum

Posted on October 26, 2016 by rburnham

THEMIS Image of the Day, October 26, 2016. The “tail” behind the crater at the top of this VIS image is called a windstreak. This feature is formed by winds blowing over, in, and around the crater. Turbulence in the … Continue reading →

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