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Tag Archives: alluvial fans
HiRISE: Alluvial fan in a low-latitude crater
On Earth, alluvial fans form in desert regions when heavy but sporadic rainfall washes debris from upslope and deposits it in a wedge-shaped fan on the lower slopes below. On Mars, alluvial fans are sometimes visible in impact crater basins, … Continue reading
Posted in Reports
Tagged alluvial fans, channels, High Resolution Imaging Science Experiment, HiRISE, Mars Reconnaissance Orbiter, mass wasting, MRO, NASA, University of Arizona
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THEMIS: Alluvial fans
THEMIS Image of the Day, April 30, 2014. Triangular shaped deposits at cliff edges are termed alluvial fans. Alluvial fans typically form in arid regions were water flow is limited, so deposits of material are not washed away. Formation of … Continue reading
Posted in Reports
Tagged alluvial fans, Arizona State University, ASU, channels, Kasei Valles, Mars Odyssey, NASA, outflow channels, THEMIS, Thermal Emission Imaging System, water
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When did water flow in Gale Crater?
The Mars Science Laboratory rover Curiosity, sent to find habitable environments, landed in Gale Crater on the far end of an alluvial fan. This fan spreads south across Gale’s floor from the north rim. It is built from sediments washed … Continue reading
Posted in Reports
Tagged Aeolis Mons, alluvial fans, channels, cratering rate, craters, Curiosity, Gale Crater, Mars Science Laboratory, Mount Sharp, MSL, Peace Vallis, water
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HiRISE image: Far end of an alluvial fan
Beautiful Mars series: Far end of an alluvial fan on the floor of a crater in Xanthe Terra. More Beautiful Mars images.
Posted in Reports
Tagged alluvial fans, Beautiful Mars, channels, High Resolution Imaging Science Experiment, HiRISE, Mars Reconnaissance Orbiter, MRO, NASA, University of Arizona, Xanthe Terra
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Well-rounded pebbles in Gale Crater’s rocks point to longtime stream flow
Mars Science Laboratory rover Curiosity landed in Gale Crater at a feature called Bradbury Rise, which lies near the far end of the Peace Vallis alluvial fan. The fan is a broad, flat deposit of sand, gravel, and pebbles washed … Continue reading
Posted in Reports
Tagged Aeolis Mons, alluvial fans, Bradbury Rise, climate change, conglomerate rocks, Curiosity, fluvial channels, Gale Crater, Goulburn, gravel, Hottah, Link, Mars Pathfinder, Mount Sharp, outcrops, Peace Vallis, pebbles, streambeds, water
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Gale Crater’s Lake District
Mars rover Curiosity landed on, or just beyond, the far end of an alluvial fan — rocks, gravel, and sand washed down by the Peace River from the north rim of Gale Crater. The rover has driven for 200 sols … Continue reading
Posted in Reports
Tagged alluvial fans, climate change, Crater Lake, craters, Curiosity, Gale Crater, HiRISE, LPSC 2013, MSL, water
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Making fans all over
Water and sediment run downhill, on Earth and Mars alike. And when they do, they build broad alluvial (outwash) fans at the foot of slopes. But how fast do these fans accumulate? On Mars, at least, it looks like they … Continue reading