Tag Archives: layered deposits

THEMIS: Sand sheet in Rabe Crater

THEMIS Image of the Day, December 18, 2017. The majority of the dune field in Rabe Crater consists of a sand sheet with dune forms on the surface. The sand sheet is where a thick layer of sand has been … Continue reading

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THEMIS: Landscapes control winds, dunes in Rabe Crater

THEMIS Image of the Day, December 15, 2017. This VIS image provides another instance where the topography of the upper floor material affects the winds and dune formation. At the edges of the dune field, the dunes become smaller and … Continue reading

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THEMIS: Cascading dunes in Rabe Crater

THEMIS Image of the Day, December 14, 2017. This VIS image of Rabe Crater is dominated by the extensive dunes that cover the crater floor. To the top of the image part of the pit is visible, as well as … Continue reading

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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: 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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