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Tag Archives: sand dunes
The transition between sand ripples and megaripples on Mars
[Editor’s note: From a paper by James Zimbelman recently published in Icarus.] The transition between sand ripples and megaripples on Mars • HiRISE images of small sand dunes and megaripples in Gamboa and Matara craters on Mars suggest that there … Continue reading
Posted in Reports
Tagged Gamboa Crater, Matara Crater, megaripples, sand dunes, sand ripples
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THEMIS: Inuvik Crater in false color
THEMIS Image of the Day, May 21, 2019. Today’s false-color image shows Inuvik Crater, located near the north polar cap. The THEMIS VIS camera contains 5 filters. The data from different filters can be combined in multiple ways to create … Continue reading
Posted in Reports
Tagged Arizona State University, ASU, false color, Inuvik Crater, Mars Odyssey, NASA, north polar ice cap, sand dunes, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System
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THEMIS: Dune mound in Acidalia Planitia crater
THEMIS Image of the Day, May 17, 2019. Today’s false color image shows an unnamed crater in Acidalia Planitia. The dark blue feature on the crater floor is a mound of sand. The sand is tall enough to cast a … Continue reading
Posted in Reports
Tagged Acidalia Planitia, Arizona State University, ASU, basaltic sand, false color, Mars Odyssey, NASA, sand dunes, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System
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THEMIS: Basaltic dunes on a Meridiani Planum crater floor
THEMIS Image of the Day, May 16, 2019. Today’s false color image shows an unnamed crater north of Meridiani Planum. The dark blue features are small basaltic sand dunes. The THEMIS VIS camera contains 5 filters. The data from different … Continue reading
Posted in Reports
Tagged Arizona State University, ASU, basaltic sand, false color, Mars Odyssey, Meridiani Planum, NASA, sand, sand dunes, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System
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THEMIS: Slopes and dunes of Sisyphi Cavi
THEMIS Image of the Day, May 2, 2019. This VIS image shows part of Sisyphi Cavi located in Noachis Terra near the south polar cap. Cavi are defined as steep sided depressions. Gullies dissect the cliff tops and dunes are … Continue reading
Posted in Reports
Tagged Arizona State University, ASU, dunes, gullies, Mars Odyssey, NASA, sand dunes, Sisyphi Cavi, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System
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HiRISE: Megadunes in Hyperborei Cavi
Megadunes in Hyperborei Cavi. A cavus is an irregular steep-sided depression usually in arrays or clusters. Plus: MEGADUNES! HiRISE Picture of the Day archive. [More at links]
Posted in Reports
Tagged dunes, Hyperborei Cavi, north polar layered deposits, north polar region, sand dunes
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THEMIS: Kaiser Crater dunes
THEMIS Image of the Day, April 23, 2019. This VIS image shows large individual dunes on the floor of Kaiser Crater. Small dark lines to the right of the sand dunes are the tracks made by dust devils as they … Continue reading
Posted in Reports
Tagged active dunes, Arizona State University, ASU, dunes, dust devil tracks, Kaiser Crater, Mars Odyssey, NASA, sand dunes, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System
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THEMIS: Sand sheet, dunes in Matara Crater
THEMIS Image of the Day, April 22, 2019. Today’s VIS image shows the floor of Matara Crater. A large sand sheet with surface dune forms dominates the floor of this crater located in Noachis Terra. The dunes’ dark tone indicates … Continue reading
Posted in Reports
Tagged Arizona State University, ASU, Mars Odyssey, Matara Crater, NASA, Noachis Terra, sand dunes, sand sheets, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System
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HiRISE: Bedrock on the floor of Kaiser Crater
HiRISE has often imaged inside Kaiser Crater to monitor active sand dunes and gullies. Surrounding these dunes, we often find clean bedrock exposures, because the actively moving sand clears off the dust. Kaiser Crater is 207 kilometers wide and was … Continue reading
Posted in Reports
Tagged active dunes, bedrock, High Resolution Imaging Science Experiment, HiRISE, Kaiser Crater, Mars Reconnaissance Orbiter, MRO, NASA, sand dunes, University of Arizona
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THEMIS: Arabia Terra crater dunes
THEMIS Image of the Day, April 15, 2019. Today’s VIS image is located in an unnamed crater in Arabia Terra. Dark blue in this combination is typically basaltic sands. The presence of sand dunes with this tone indicated that these … Continue reading
Posted in Reports
Tagged Arabia Terra, Arizona State University, ASU, basaltic sand, false color, Mars Odyssey, NASA, san, sand dunes, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System
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