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Tag Archives: periglacial terrain
HiRISE: The exposed exterior of a modified crater in Tantalus Fossae
The exposed exterior of a modified crater in Tantalus Fossae. Many craters in this area have been extensively modified, but few are sitting on the edge of a graben like this. This position exposes parts of the crater exterior and … Continue reading
Posted in Reports
Tagged Beautiful Mars, glacial deposits, graben, High Resolution Imaging Science Experiment, HiRISE, Mars Reconnaissance Orbiter, MRO, NASA, periglacial processes, periglacial terrain, Tantalus Fossae, University of Arizona
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HiRISE: The Case of the Martian Boulder Piles
This image was originally meant to track the movement of sand dunes near the North Pole of Mars, but what’s on the ground in between the dunes is just as interesting! The ground has parallel dark and light stripes from … Continue reading
Posted in Reports
Tagged frost heaves, frost polygons, High Resolution Imaging Science Experiment, HiRISE, Mars Reconnaissance Orbiter, MRO, NASA, periglacial processes, periglacial terrain, polygonal terrain, sand dunes, University of Arizona
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Geologically recent glacial melting on Mars
Planetary Geomorphology Image of the Month, March 1, 2018: Frances E.G. Butcher (Open University, Milton Keynes, UK). Thousands of putative debris-covered glaciers in Mars’ middle latitudes host water ice in volumes comparable to that of all glaciers and ice caps … Continue reading
Posted in Reports
Tagged eskers, glaciers, mid-latitude glaciers, periglacial processes, periglacial terrain, Tempe Terra
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HiRISE: Stranger (crater) things
Stranger (crater) things. Could this deposit at the bottom of an impact crater be a relic of glacial features? Beautiful Mars series.
Posted in Reports
Tagged Beautiful Mars, High Resolution Imaging Science Experiment, HiRISE, Mars Reconnaissance Orbiter, MRO, NASA, periglacial processes, periglacial terrain, rock glaciers, Tyrrhena Terra, University of Arizona
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Enigmatic clastic polygons on Mars
Planetary Geomorphology Image of the Month, February 1, 2018: Laura Brooker (Open University, Milton Keynes, UK). Polygonal ground of centimetre- to decametre-scale is one of the most common features found in cold-climate regions on Earth and on Mars. Polygonal shapes … Continue reading
Posted in Reports
Tagged frost polygons, ice polygons, Lyot Crater, periglacial processes, periglacial terrain, polygonal terrain
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HiRISE: Hexagons in icy terrain
Ground cemented by ice covers the high latitudes of Mars, much as it does in Earth’s cold climates. A common landform that occurs in icy terrain are polygons. Polygonal patterns form by winter cooling and contraction cracking of the frozen … Continue reading
Posted in Reports
Tagged ground ice, High Resolution Imaging Science Experiment, HiRISE, ice, ice polygons, Mars Reconnaissance Orbiter, MRO, NASA, patterned ground, periglacial processes, periglacial terrain, polygonal terrain, University of Arizona
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HiRISE: Dune maze craze
Dune maze craze. This image shows sand dunes on the northern plains in the spring, when the seasonal frost is sublimating (and making crazy patterns). The dunes have coalesced here into an interlocking maze. Polygons between the dunes are due … Continue reading
Posted in Reports
Tagged Beautiful Mars, High Resolution Imaging Science Experiment, HiRISE, Mars Reconnaissance Orbiter, MRO, NASA, northern lowlands, northern plains, periglacial processes, periglacial terrain, sand dunes, University of Arizona
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HiRISE: Depressions and channels on the floor of Lyot Crater
Lyot Crater (220-kilometers in diameter) is located in the Northern lowlands of Mars. The crater’s floor marks the lowest elevation in the Northern Hemisphere. On the crater’s floor, we see a network of channels connecting a series of irregular shaped … Continue reading
Posted in Reports
Tagged High Resolution Imaging Science Experiment, HiRISE, Lyot Crater, Mars Reconnaissance Orbiter, MRO, NASA, periglacial processes, periglacial terrain, permafrost, University of Arizona
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Creepy stuff: possible solifluction on Mars
Planetary Geomorphology Image of the Month, November 30, 2017: Andreas Johnsson (University of Gothenburg, Sweden). Small-scale lobes on Mars (Fig. 1) are tens to hundreds of meters wide and consist of an arcuate frontal riser that is a meter to … Continue reading
Posted in Reports
Tagged frost, ground ice, mass wasting, periglacial processes, periglacial terrain, soil, solifluction
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