Tag Archives: dust avalanches

THEMIS: Dark streaks on the rim of Orcus Patera

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

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

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

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

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

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

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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THEMIS: Dark slope streaks in rugged terrain

THEMIS Image of the Day, May 31, 2018. This VIS image shows part of the ‘rim’ of Orcus Patera. How Orcus Patera formed is a mystery. Along the east facing ridge walls in this image multiple regions of dark slope … Continue reading

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HiRISE: A nice gathering of slope streaks

A nice gathering of slope streaks. Beautiful Mars series.

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HiRISE: Splitting slope streaks

Streaks form on slopes when dust cascades downhill. The dark streak is an area of less dust compared to the brighter and reddish surroundings. What triggers these avalanches is not known, but might be related to sudden warming of the … Continue reading

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