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Tag Archives: sand dunes
Dunes decrease in size at high southern latitudes, likely from ground ice cementation
[Editor’s note: From a paper by Maria Banks and seven co-authors recently published in the Journal of Geophysical Research.] Patterns in Mobility and Modification of Middle‐ and High‐Latitude Southern Hemisphere Dunes on Mars • The mobility of dunes and ripples … Continue reading
Posted in Reports
Tagged dunes, ground ice, sand dunes, Southern Highlands, southern polar dunes
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THEMIS: Dunes on the move in Aonia Terra
THEMIS Image of the Day, December 28, 2018. Located in the center of this VIS image is a group of sand dunes. With enough wind and sand, sand dunes are formed. Dune morphology typically has a shallow slope on the … Continue reading
Posted in Reports
Tagged Aonia Terra, Arizona State University, ASU, dunes, Mars Odyssey, NASA, sand dunes, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System
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THEMIS: Sand sheet in Halley Crater
THEMIS Image of the Day, December 24, 2018. This VIS image shows part of the dune field on the floor of Halley Crater. Rather than small individual sand dunes, the sand here is collected into a sand sheet and dune … Continue reading
Posted in Reports
Tagged active dunes, Argyre Planitia, Arizona State University, ASU, basaltic sand, Halley Crater, Mars Odyssey, NASA, sand dunes, sand sheet, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System
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THEMIS: On the edge of the south polar ice cap
THEMIS Image of the Day, December 20, 2018. At the bottom of this image is the layered edge of the south polar cap. There are more layers visible between the bright polar material and the dark sand dunes at the … Continue reading
Posted in Reports
Tagged Arizona State University, ASU, dunes, Mars Odyssey, NASA, sand dunes, south polar ice cap, south polar layered deposits, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System
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THEMIS: Tapestry of dunes in Proctor Crater
THEMIS Image of the Day, December 14, 2018. This VIS image shows part of the extensive dune field on the floor of Proctor Crater. Proctor Crater is located in Noachis Terra. See more THEMIS Images of the Day by geological … Continue reading
Posted in Reports
Tagged Arizona State University, ASU, dunes, Mars Odyssey, NASA, Noachis Terra, Proctor Crater, sand dunes, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System
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THEMIS: Active dune field in Noachis
THEMIS Image of the Day, December 13, 2018. Today’s VIS image shows sand dunes on the floor of an unnamed crater in Noachis Terra. These dunes are likely active because they are dark, indicating that they move often enough to … Continue reading
Posted in Reports
Tagged active dunes, Arizona State University, ASU, basaltic sand, Mars Odyssey, mid-latitude mantling, NASA, Noachis Terra, sand, sand dunes, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System
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THEMIS: Gullies in Noachis Terra
THEMIS Image of the Day, December 10, 2018. Numerous channels, also called gullies, dissect the rim of this unnamed crater in Noachis Terra. (Note that the lighting in this image comes from the lower right.) At upper right lies a … Continue reading
Posted in Reports
Tagged active dunes, Arizona State University, ASU, dunes, gullies, Mars Odyssey, NASA, sand dunes, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System
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THEMIS: Halley Crater dunes
THEMIS Image of the Day, December 6, 2018. Halley Crater is located on the western side of Argyre Planitia. Sand dunes cover part of the crater floor. The dunes’ dark tone indicates they are free from dust. This in turn … Continue reading
Posted in Reports
Tagged active dunes, Argyre Planitia, Arizona State University, ASU, basaltic sand, dunes, Halley Crater, Mars Odyssey, NASA, sand dunes, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System
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HiRISE: Dunes in the shapes of Ts and Vs
Dunes in the shapes of Ts and Vs. They also look like funnel shapes. Beautiful Mars series. [More at links]
Posted in Reports
Tagged Beautiful Mars, dunes, High Resolution Imaging Science Experiment, HiRISE, Mars Reconnaissance Orbiter, MRO, NASA, north polar sand sea, sand dunes, University of Arizona
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HiRISE: Active dunes in Wirtz Crater
These gorgeous dunes are likely active, with ripples on their upwind slopes and dark streaks on their downwind slopes forming and changing due to wind-driven sand motion. This motion will also keep the dune brink (the edge between the two … Continue reading
Posted in Reports
Tagged active dunes, basaltic sand, dust devil tracks, High Resolution Imaging Science Experiment, HiRISE, Mars Reconnaissance Orbiter, MRO, NASA, sand dunes, University of Arizona
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