Martian sand dune, satellite image

Martian sand dune, satellite image

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This image is part of the feature Mars As Art


Caption: Martian sand dune. Coloured satellite image of a crater-floor sand dune. The blue-grey swirling patterns are trails created by small tornadoes, known as 'dust devils', which lifts the lighter coloured martian dust from the surface to reveal the dark-coloured basaltic sand beneath. Ripples on the surface of the dune were created by the wind. Straight dark-coloured lines (lower middle and upper left) are probably caused by landslides. Image obtained by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter (MRO) on 24th August 2009. The width of this image is roughly 1.1 kilometres across.

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Keywords: 2009, 21st century, aeolian geology, arid, basalt, basaltic, crater basin, crescent, desert, dunes, dust devil, dust trails, erosion, from space, geographical, geography, geological, geology, high resolution imaging, hirise, hirise camera, landslide, landslides, marks, mars, mars reconnaissance orbiter, martian, martian dust, mro, nasa, pattern, patterns, planetary science, planetary surface, red dust, ripple, rippled, ripples, sand dune, sand dunes, satellite image, solar system, space mission, surface, tornado, tornadoes, tracks, trail, volcanic rock, volcanic rocks, wind blown, wind-blown, windblown

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