Tag Archives: Arizona State University

THEMIS: Sand sea in Rabe Crater

THEMIS Image of the Day, December 13, 2017. Dunes cover the majority of this image of Rabe Crater. As the dunes are created by wind action the forms of the dunes record the wind direction. Dunes will have a long … Continue reading

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THEMIS: Edge of the pit in Rabe Crater

THEMIS Image of the Day, December 12, 2017. In this VIS image of the floor of Rabe Crater the step down into the pit is visible in the sinuous ridges on the left side of the image. The appearance of … Continue reading

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THEMIS: Dunes swirl in Rabe Crater

THEMIS Image of the Day, December 11, 2017. Rabe Crater is 108 km (67 miles) across. Craters of similar size often have flat floors. Rabe Crater has some areas of flat floor, but also has a large complex pit occupying … Continue reading

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THEMIS: Giant landslide in Melas Chasma

THEMIS Image of the Day, December 8, 2017. This VIS image is located along the northern side of the chasma. The linear features are on the surface of a large landslide. This region of Melas Chasma is covered by several … Continue reading

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THEMIS: Dunes swirl across landslide rubble

THEMIS Image of the Day, December 7, 2017. This VIS image is located along the northern cliff face of Melas Chasma. The linear features are large landslide surfaces. A region of sand dunes is located along the change in elevation … Continue reading

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THEMIS: Landslide rubble, hills, and layered deposits on floor of Melas Chasma

THEMIS Image of the Day, December 6, 2017. This VIS image is located right at the edge of the canyon with the surrounding plains – the flat area at the bottom of the image. Some small landslide deposits are visible … Continue reading

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THEMIS: Layered deposits in Melas Chasma

THEMIS Image of the Day, December 5, 2017. Today’s image is just a bit further to the west of yesterday’s. Here there are no dunes, but extensive outcrops of layered material. It is possible that these layered deposits were formed … Continue reading

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THEMIS: Dunes gather on the Melas Chasma floor

THEMIS Image of the Day, December 4, 2017. Today’s image contains a large region of dunes between the canyon cliff face and the large ridge of material at the mid-elevation of the canyon. Fine materials have been concentrated into the … Continue reading

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THEMIS: Hills and landslide debris in Melas Chasma

THEMIS Image of the Day, December 1, 2017. Today’s image covers part of the floor of the canyon. At the top of the image is one of the many hills found on the floor in this region. The linear grooved … Continue reading

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THEMIS: On the floor of a canyon, within a much bigger canyon

THEMIS Image of the Day, November 30, 2017. Today’s image of the southern section of the canyon shows a large region of sand dunes. The presence of dunes indicates wind action as the most recent geologic process modifying the canyon. … Continue reading

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