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Tag Archives: periglacial processes
THEMIS: Dunes and glacial deposits in Moreux Crater
THEMIS Image of the Day, May 30, 2018. Moreux Crater is located in the northern part of Terra Sabaea. The crater has a region of sand dunes on the crater floor, as well as features that are similar to glacial … Continue reading
Posted in Reports
Tagged Arizona State University, ASU, dunes, glacial deposits, glaciers, Mars Odyssey, Moreux Crater, NASA, periglacial processes, periglacial terrain, rock glaciers, sand dunes, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System
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THEMIS: Softly rounded hills in Phlegra Montes
THEMIS Image of the Day, April 25, 2018. The rounded hills in this VIS image are located in Arcadia Planitia. Broad linear ridges and groups of hills in this region are part of Phlegra Dorsa (ridges) and Phlegra Montes (hills). … Continue reading
Posted in Reports
Tagged Arizona State University, ASU, hills, ice-rich mantling, Mars Odyssey, NASA, periglacial processes, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System
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THEMIS: Dunes and creeping ground in Lyot Crater
THEMIS Image of the Day, April 11, 2018. Lyot Crater is a large, complex crater in the northern lowlands of Vastitas Borealis. This image is located along the southern rim of the crater and shows part of the dune fields … Continue reading
Posted in Reports
Tagged active dunes, Arizona State University, ASU, dunes, ice-rich mantling, Lyot Crater, Mars Odyssey, NASA, periglacial processes, sand dunes, solifluction, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System, Vastitas Borealis
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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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Opportunity: ‘Rock stripes’ and other surprises
NASA’s Mars Exploration Rover Opportunity keeps providing surprises about the Red Planet, most recently with observations of possible “rock stripes.” The ground texture seen in recent images from the rover resembles a smudged version of very distinctive stone stripes on … Continue reading
Posted in Reports
Tagged Cape Byron, Endeavour Crater, Mars Exploration Rover, MER, NASA, Opportunity, periglacial processes, Perseverance Valley, rock stripes, stone stripes
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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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