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Tag Archives: sand dunes
HiRISE: Bedrock riddles of Nili Fossae
This image of the Nili Fossae region, to the west of the great Isidis basin, shows layered bedrock with many impact craters. Nili Fossae is one of the most mineralogically important sites on Mars. Remote observations by the infrared spectrometer … Continue reading
Posted in Reports
Tagged bedrock, carbonate minerals, clay minerals, dunes, High Resolution Imaging Science Experiment, HiRISE, iron oxides, Isidis Basin, Mars Reconnaissance Orbiter, MRO, NASA, Nili Fossae, sand dunes, TARs, transverse dunes, transverse eolian ridges, University of Arizona
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THEMIS: Patterns on patterns in Olympia Undae
THEMIS Image of the Day, September 4, 2019. Today’s VIS image shows part of Olympia Undae, the largest of several dune fields that encircle the north polar cap. (It is also known as the north polar sand sea.) This image … Continue reading
Posted in Reports
Tagged Arizona State University, ASU, Mars Odyssey, NASA, north polar sand sea, Olympia Undae, sand dunes, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System
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HiRISE: Raindrops of sand in Copernicus Crater
Raindrops of sand in Copernicus Crater. The dark features here look like raindrops, but are actually sand dunes rich in the mineral olivine. These types of dunes are rare on Earth as olivine rapidly weathers to clays in a wet … Continue reading
Posted in Reports
Tagged Copernicus Crater, eolian processes, High Resolution Imaging Science Experiment, HiPOD, HiRISE, HiRISE Picture of the Day, Mars Reconnaissance Orbiter, MRO, NASA, olivine, sand, sand dunes, University of Arizona
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HiRISE: Into the dune database
Into the dune database. Dunes are particularly suited to comprehensive planetary studies because they are abundant over a wide range of elevations and terrain types. Observations like this one are used to aid in classification and volume estimates of dunes … Continue reading
Posted in Reports
Tagged dunes, eolian processes, High Resolution Imaging Science Experiment, HiPOD, HiRISE, HiRISE Picture of the Day, Mars Reconnaissance Orbiter, MRO, NASA, sand dunes, University of Arizona
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THEMIS: Lyot Crater dune field
THEMIS Image of the Day, August 9, 2019. 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 field … Continue reading
Posted in Reports
Tagged Arizona State University, ASU, Lyot Crater, Mars Odyssey, NASA, northern lowlands, sand, sand dunes, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System, Vastitas Borealis
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THEMIS: At the north polar cap’s edge
THEMIS Image of the Day, August 7, 2019. Today’s VIS image is located on the edge of the polar cap. The ice is located at the bottom of the frame, with the surrounding plains at the top half. The circular … Continue reading
Posted in Reports
Tagged Arizona State University, ASU, Mars Odyssey, NASA, north polar ice cap, polar sand dunes, sand dunes, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System
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THEMIS: North polar layers and sand dunes
THEMIS Image of the Day, July 23, 2019. Today’s VIS image shows part of the north polar cap, as well as sand dunes located on the floor of a polar trough. The north polar cap is surrounded by numerous dune … Continue reading
Posted in Reports
Tagged Arizona State University, ASU, Mars Odyssey, NASA, north polar ice cap, north polar layered deposits, north polar sand sea, polar troughs, sand dunes, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System
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THEMIS: Patterns on patterns in the Olympia Undae dunes
THEMIS Image of the Day, July 19, 2019. Today’s VIS image shows a small portion of Olympia Undae. Olympia Undae is a large dune field that dominates the plains along part of the north polar cap. This image was collected … Continue reading
Posted in Reports
Tagged Arizona State University, ASU, Mars Odyssey, NASA, north polar sand sea, northern plains, Olympia Undae, sand, sand dunes, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System, wind
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