Tag Archives: dust avalanches

HiRISE: Wisps

Posted on June 10, 2019 by rburnham

Wisps. This rough terrain with prominent, wispy dust streaks is within Mangala Valles. Mangala Valles is a complex system of criss-crossing channels on Mars, located in the Tharsis region. HiRISE Picture of the Day archive. [More at links]

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HiRISE: Impact-induced dust avalanches

Posted on April 16, 2019 by rburnham

HiRISE has been imaging new dark features discovered by MRO’s Context Camera, which are mostly new impact sites. In this scene we see what appears to be a new impact cluster and, extending downhill from the craters, new dark slope … Continue reading →

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HiRISE: An Olympus Mons landslide

Posted on February 12, 2019 by rburnham

An Olympus Mons landslide. Olympus Mons is too large for HiRISE to capture in one image, but we can get very detailed closeups of parts of it. Here, we see a slope streak, possibly caused by a boulder rolling downhill … Continue reading →

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THEMIS: Dark streaks on the rim of Orcus Patera

Posted on August 15, 2018 by rburnham

THEMIS Image of the Day, August 15, 2018. Today’s VIS image is located on the western margin of Orcus Patera. Dark slope streaks are present on most ridges in the image. Formation of these features is linked to a change … Continue reading →

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THEMIS: Crosscross tectonics in Lycus Sulci

Posted on August 14, 2018 by rburnham

THEMIS Image of the Day, August 14, 2018. Lycus Sulci is a very complex region surrounding the northern and western flanks of Olympus Mons. This VIS image shows some of the tectonic features found in Lycus Sulci as well as … Continue reading →

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THEMIS: Terra Sabaea dark slope streaks

Posted on August 9, 2018 by rburnham

THEMIS Image of the Day, August 9, 2018. This VIS image is located in Terra Sabaea. The ridge near the right side of the image contains dark slope streaks. These features are thought to form by downslope movement of material … Continue reading →

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THEMIS: Dark slope streaks in Terra Sabaea

Posted on August 7, 2018 by rburnham

THEMIS Image of the Day, August 7, 2018. This VIS image is located in an unnamed crater in Terra Sabaea. The entire inner rim of the crater near the center of the image contains dark slope streaks. These features are … Continue reading →

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HiRISE: Dark side of dust avalanches

Posted on July 26, 2018 by rburnham

The dark side of dust avalanches. Changes on the Martian surface are detected by imaging the same area more than once. Here, we see several new dust avalanches on the slopes of ridges within the Olympus Mons Aureole. These changes … Continue reading →

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Medusae Fossae Formation: single largest source of dust on Mars

Posted on July 24, 2018 by rburnham

The dust that coats much of the surface of Mars originates largely from a single thousand-kilometer-long geological formation near the Red Planet’s equator, scientists have found. A study published in the journal Nature Communications found a chemical match between dust … Continue reading →

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THEMIS: Dust avalanches in Lycus Sulci

Posted on June 14, 2018 by rburnham

THEMIS Image of the Day, June 14, 2018. Lycus Sulci is a very complex region surrounding the northern and western flanks of Olympus Mons. This VIS image shows some of the tectonic ridges found in Lycus Sulci as well as … Continue reading →

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