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Tag Archives: basaltic sand
THEMIS: Basaltic sands in Marth Crater
THEMIS Image of the Day, February 21, 2019. This false color image shows part of the floor of Marth Crater. Dark blue tones typically indicate basaltic sands. Wind action is blowing the sand and dust to the southern side of … Continue reading
Posted in Reports
Tagged Arizona State University, ASU, basaltic sand, false color, Mars Odyssey, Marth Crater, NASA, sand, sand dunes, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System
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THEMIS: Pasteur Crater in false color
THEMIS Image of the Day, February 20, 2019. Today’s image shows part of the floor of Pasteur Crater. The deposit in the southwest part of the floor is a fill deposit that is undergoing erosion. Small sand dunes are found … Continue reading
Posted in Reports
Tagged Arizona State University, ASU, basaltic sand, false color, Mars Odyssey, NASA, Pasteur Crater, sand, sand dunes, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System
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THEMIS: Herschel Crater floor in false color
THEMIS Image of the Day, February 19, 2019. This VIS image shows part of the floor of Herschel Crater. Sand dunes are visible at the bottom of the image. The dark blue in this false color image typically indicates basaltic … Continue reading
Posted in Reports
Tagged Arizona State University, ASU, basaltic sand, dunes, false color, Herschel Crater, 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: 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: 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: 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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THEMIS: Active dunes in Noachis Terra
THEMIS Image of the Day, November 28, 2018. Today’s VIS image shows a sand sheet with surface dunes forms on the floor of an unnamed crater in Noachis Terra. Dark dunes indicate active dunes: Winds stir the sand, which kicks … Continue reading
Posted in Reports
Tagged active dunes, Arizona State University, ASU, basaltic sand, Mars Odyssey, NASA, Noachis Terra, sand dunes, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System
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THEMIS: Dunes in Kaiser Crater
THEMIS Image of the Day, November 23, 2018. This VIS image shows part of the floor of Kaiser Crater, including several sand dunes. Kaiser Crater is located in Noachis Terra. The dunes’ dark tone indicates they are free of dust, … Continue reading
Posted in Reports
Tagged active dunes, Arizona State University, ASU, basaltic sand, dunes, Kaiser Crater, Mars Odyssey, NASA, sand dunes, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System
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Volcanic ash: Major source of Mars dust?
[Editor’s note: From a paper by Charlie Bristow and Torsten Moller, recently published in the Journal of Geophysical Research.] Dust Production by Abrasion of Eolian Basalt Sands: Analogue for Martian Dust • Collisions between particles and surfaces during eolian abrasion … Continue reading