Tag Archives: boulders

HiRISE: Bouncing boulders

Posted on April 8, 2019 by rburnham

Most debris on crater walls slides straight downhill. In this HiRISE image we see examples of boulders that have bounced downhill, not necessarily vertically. A prominent example looks like a dotted line from the top of the crater wall where … Continue reading →

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Boulder trails suggest possible recent marsquakes

Posted on February 7, 2019 by rburnham

[Editor’s note: From a paper by Jason Brown and Gerald Roberts co-authors recently published in the Journal of Geophysical Research.] Possible evidence for variation in magnitude for marsquakes from fallen boulder populations, Grjota Valles, Mars Boulder trail populations were measured … Continue reading →

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HiRISE: Bouldery plains

Posted on April 18, 2018 by rburnham

Sometimes we see a field of boulders rather than bedrock, as in this image. [More at link]

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HiRISE: Count the boulders in Krupac Crater

Posted on October 26, 2017 by rburnham

Count the boulders in Krupac Crater. Beautiful Mars series.

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HiRISE: Youthful dark-rayed crater with boulders

Posted on January 27, 2017 by rburnham

A youthful dark rayed crater with boulders. Beautiful Mars series.

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HiRISE: Trundling boulders

Posted on November 10, 2016 by rburnham

This picture of the rim of Eos Chasma in Valles Marineris shows active erosion of the Martian surface. Layered bedrock is exposed in a steep cliff on a spur of the canyon rim. Dark layers in this cliff are made … Continue reading →

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Opportunity: Spirit Mound workspace

Posted on September 28, 2016 by rburnham

Sols 4505-07, September 26-28, 2016. Above is a shot looking over Spirit Mound toward a boulder field out on the floor of Endeavour Crater. At right is a three-shot composite (1.7 MB) taken over three sols of the workspace that … Continue reading →

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HiRISE: Slope instability

Posted on July 20, 2016 by rburnham

One small section of this image shows boulders that have rolled down the slope of a crater wall. The boulders vary in size, with the largest one approximately 6 meters across. Unlike the boulder in a previous image, this one … Continue reading →

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HiRISE: Boulder field in Utopia Planitia

Posted on June 15, 2016 by rburnham

Boulder field in Utopia Planitia. Beautiful Mars series.

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HiRISE: Boulder festival in Masursky Crater

Posted on April 8, 2016 by rburnham

This image covers part of the chaotic terrain in Masursky Crater, and was targeted due to evidence that ejecta from Mojave Crater—to the south—may have modified the landscape. Mojave Crater may be the most recent large (more than 50-kilometer wide) … Continue reading →

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