Tag Archives: Melas Chasma

THEMIS: Layered buttes & dunes in Melas Chasma

THEMIS Image of the Day, November 27, 2017. Melas Chasma is part of the largest canyon system on Mars, Valles Marineris. At only 563 km long (349 miles) it is not the longest canyon, but it is the widest. Located … Continue reading

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HiRISE: Mixtures of sulfates in Melas Chasma

Many locations on Mars have sulfates, which are sedimentary rocks formed in water. Within Valles Marineris, the large canyon system that cuts across the planet, there are big and thick sequences of sulfates. In this image, layering within the light-toned … Continue reading

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THEMIS: Melas Chasma landslide in false color

THEMIS Image of the Day, July 13, 2017. Today’s false color image shows part of Melas Chasma, along with a gigantic landslide where part of the canyon rim has collapsed. The THEMIS camera contains 5 filters. The data from different … Continue reading

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HiRISE: Faults in Melas Chasma

Faults in Melas Chasma. Beautiful Mars series.

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HiRISE: Clinoforms down in Melas Chasma

This group of steeply inclined light-toned layers is bounded above and below by unconformities (sudden or irregular changes from one deposit to another) that indicate a “break” where erosion of pre-existing layers was taking place at a higher rate than … Continue reading

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HiRISE: Terminal lobes of a large debris flow in Melas Chasma

Terminal lobes of a large debris flow in Melas Chasma. Beautiful Mars series.

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THEMIS: Rubble and ridges in Melas Chasma

THEMIS Image of the Day, December 5, 2016. Today’s VIS image shows part of the canyon wall of Melas Chasma. Landslides and “mass wasting” — the downslope movement of loose debris — have eroded the canyon walls and dumped a … Continue reading

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HiRISE: Deposits along Melas Chasma’s north wall

It has been known since the 1970s when the Viking orbiters took pictures of Mars that there are large (i.e., several kilometers-thick) mounds of light-toned deposits within the central portion of Valles Marineris. More recent higher resolution images of Mars, … Continue reading

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Do salts draw water from atmosphere for RSLs?

Puzzles persist about possible water at seasonally dark streaks on Martian slopes, according to a new study of thousands of such features in the Red Planet’s largest canyon system. The study published today [in the Journal of Gephysical Research] investigated … Continue reading

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HiRISE: Pitted cones in Melas Chasma

Pitted cones in Melas Chasma. Beautiful Mars series.

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