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Tag Archives: impact craters
HiRISE: Recent impact site in Noachis Terra
This image shows a recent impact in Noachis Terra in the southern mid-latitudes of Mars. The impact occurred in dark-toned ejecta material from a degraded, 60-kilometer crater to the south. Rather than a single impact crater, we see multiple impacts … Continue reading
Posted in Reports
Tagged High Resolution Imaging Science Experiment, HiRISE, impact craters, impacts, Mars Reconnaissance Orbiter, MRO, multiple impacts, NASA, Noachis Terra, recent impacts, University of Arizona
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HiRISE: Exposing the rock in impact craters
In this complex crater (about 44-kilometers in diameter), we see bedrock in several locations from different depths in the crust. The central uplift exposes large fragments of green-toned bedrock that possibly originated from several kilometers beneath the surface. To the … Continue reading
Posted in Reports
Tagged bedrock, central peaks, High Resolution Imaging Science Experiment, HiRISE, impact craters, Mars Reconnaissance Orbiter, MRO, NASA, University of Arizona
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HiRISE: Impact near the south pole
This image shows a new impact crater that formed between July and September 2018. It’s notable because it occurred in the seasonal southern ice cap, and has apparently punched through it, creating a two-toned blast pattern. The impact hit on … Continue reading
Posted in Reports
Tagged High Resolution Imaging Science Experiment, HiRISE, impact craters, Mars Reconnaissance Orbiter, MRO, NASA, south polar ice cap, University of Arizona
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How do impacts make Mars central-pit craters?
[Editor’s note: From a paper by Samantha Peel and two co-authors recently published in the Journal of Geophysical Research.] Formation of central pits in impact craters on Mars: A statistical investigation of proposed mechanisms • Formation mechanisms for central pits … Continue reading
THEMIS: Something odd in Noachis Terra
THEMIS Image of the Day, January 9, 2019. This VIS image shows a portion of Noachis Terra to the northeast of Argyre Planitia. In the middle of the image is an unnamed crater that is not even close to being … Continue reading
Posted in Reports
Tagged Arizona State University, ASU, crater ejecta, impact craters, Mars Odyssey, NASA, Noachis Terra, oblique impacts, secondary craters, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System
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HiRISE: Just another quiet day on Mars
Just another quiet day on Mars. This cluster of [impact] craters is located, ironically, in Utopia Planitia. Beautiful Mars series. [More at links]
Posted in Reports
Tagged Beautiful Mars, High Resolution Imaging Science Experiment, HiRISE, impact craters, Mars Reconnaissance Orbiter, MRO, NASA, University of Arizona, Utopia Planitia
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HiRISE: Impact crater near Tempe Terra
An impact crater near Tempe Terra. Despite this crater likely being extremely old and filled-in with material, we can still see its ejecta blanket. Beautiful Mars series. [More at links]
Posted in Reports
Tagged Beautiful Mars, crater ejecta, High Resolution Imaging Science Experiment, HiRISE, impact craters, Mars Reconnaissance Orbiter, MRO, NASA, Tempe Terra, University of Arizona
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HiRISE: Crater in the aureole of Pavonis Mons
A crater in the aureole of Pavonis Mons. This is an unusual crater in the Pavonis Mons aureole, possibly a glacial deposit. It appears to have secondaries or textured ejecta (sign of freshness), but is mostly infilled. It also has … Continue reading
Posted in Reports
Tagged Beautiful Mars, High Resolution Imaging Science Experiment, HiRISE, impact craters, Mars Reconnaissance Orbiter, MRO, NASA, Pavonis Mons, Pavonis Mons aureole, periglacial processes, periglacial terrain, University of Arizona
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THEMIS: Crater rim gullies in Terra Sirenum
THEMIS Image of the Day, November 6, 2018. Numerous gullies dissect the northern rim of this unnamed crater in Terra Sirenum. The inside of the north rim faces away from the Sun and is more deeply gullied than the Sun-facing … Continue reading
Posted in Reports
Tagged Arizona State University, ASU, craters, gullies, impact craters, Mars Odyssey, NASA, pasted-on terrain, snowmelt, Terra Sirenum, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System
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THEMIS: Soft-featured craters in Arcadia Planitia
THEMIS Image of the Day, October 19, 2018. This false-color VIS image shows some of the plains and craters located in Arcadia Planitia. The soft-looking features in the impact craters indicate ground ice at shallow depths below the surface. In … Continue reading
Posted in Reports
Tagged Arcadia Planitia, Arizona State University, ASU, debris aprons, fluidized ejecta, ground ice, impact craters, Mars Odyssey, NASA, periglacial processes, periglacial terrain, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System
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