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Tag Archives: volcanics
Mantle plumes still active under Tharsis, Elysium?
[Editor’s note: From a paper by A.-C. Plesa and eight co-authors recently published in Geophysical Research Letters.] The thermal state and interior structure of Mars We constrain the thermal state and interior structure of Mars by combining a large number … Continue reading
Posted in Reports
Tagged Elysium, Elysium Planitia, InSight, Interior Exploration Using Seismic Investigations Geodesy and Heat Transport, Jet Propulsion Laboratory, JPL, mantle dynamics, NASA, plumes, Tharsis, volcanics
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THEMIS: Pit chains and craters on Ascraeus Mons
THEMIS Image of the Day, November 7, 2018. The linear features in this VIS image are located on part of the large flow feature on the southern flank of Ascraeus Mons. The features most likely formed by collapse of the … Continue reading
Posted in Reports
Tagged Arizona State University, Ascraeus Mons, ASU, collapse features, lava flows, lava tubes, Mars Odyssey, NASA, pit chains, pit craters, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System, volcanics
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HiRISE: A caldera’s steep slopes
This image shows part of the steep wall of the caldera (a large volcanic crater) at the top of Ascraeus Mons, one of Mars’ giant volcanoes. We can see chutes carved into the soft dust that has built up on … Continue reading
Posted in Reports
Tagged Ascraeus Mons, calderas, gullies, High Resolution Imaging Science Experiment, HiRISE, Mars Reconnaissance Orbiter, MRO, NASA, University of Arizona, volcanics
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HiRISE: Possible rock falls on steep slopes
Possible rock falls on steep slopes in Cerberus Fossae. Our goal here is to take “before” images at HiRISE resolution in order to identify fresh rockfalls that might be able to be associated with seismic events or Marsquakes detected by … Continue reading
Posted in Reports
Tagged Beautiful Mars, Cerberus Fossae, faulting, graben, High Resolution Imaging Science Experiment, HiRISE, InSight, Interior Exploration Using Seismic Investigations Geodesy and Heat Transport, Jet Propulsion Laboratory, JPL, Mars Reconnaissance Orbiter, marsquakes, MRO, NASA, seismicity, tectonics, University of Arizona, volcanics
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Olympus Mons and Ascraeus Mons: Geologically recent lava inflation
The summit of Olympus Mons displays lava flows, some of which are truncated by the caldera, that appear to have flowed uphill. Because lava flows downhill, this mismatch between the flow direction and present-day topography suggests that the terrain has … Continue reading
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
THEMIS: Isolated hills on Arcadia Planitia
THEMIS Image of the Day, October 23, 2018. This false-color VIS image shows some of the plains of Arcadia Planitia in the northern lowlands. Isolated small hills are a common feature in this part of the planitia. Hills like these … Continue reading
Posted in Reports
Tagged Arcadia Planitia, Arizona State University, ASU, false color, lava flows, Mars Odyssey, NASA, pseudocones, rootless cones, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System, volcanics
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HiRISE: The pits of Elysium Mons
During the 2018 Mars dust storm, we obtained a clear view of the summit of the giant volcano Elysium Mons. We see the western rim and floor of the caldera, and a chain of pits (called a “catena”) extending from … Continue reading
Posted in Reports
Tagged avalanches, catena, collapse pits, dust storms, Elysium Mons, High Resolution Imaging Science Experiment, HiRISE, Mars Reconnaissance Orbiter, MRO, NASA, pit craters, University of Arizona, volcanics
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THEMIS: Lava flows on plains east of Hecates Tholus
THEMIS image of the Day, October 16, 2018. This VIS image shows the plains to the east of Hecates Tholus. In this false-color view lie several lava flow fronts and scattered impact craters. The THEMIS VIS camera contains 5 filters. … Continue reading
Posted in Reports
Tagged Arizona State University, ASU, Hecates Tholus, impact craters, lava flows, Mars Odyssey, NASA, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System, volcanics
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HiRISE: Rising above it in Amazonis Planitia
This image shows a bright, rectangular-looking landform surrounded by a dark floor. How did this feature get here if it looks so different than its surroundings? The feature resembles a plateau. Dark streaks mark steep slopes on its sides while … Continue reading
Posted in Reports
Tagged Amazonis Planitia, dark slope streaks, High Resolution Imaging Science Experiment, HiRISE, lava flows, Mars Reconnaissance Orbiter, MRO, NASA, plateaus, University of Arizona, volcanics
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