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Tag Archives: volcanic ash
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: Channels in volcanic ash
THEMIS Image of the Day, August 22, 2018. Tyrrhenus Mons is one of the oldest martian volcanoes and Tyrrhena Fossae is the largest of the channels dissecting the volcano. As well as being one of the oldest volcanoes, it is … Continue reading
Posted in Reports
Tagged Arizona State University, ASU, fluvial channels, Mars Odyssey, NASA, pyroclastic eruptions, THEMIS, THEMIS Image of the Day, Thermal Emission Imaging System, Tyrrhena Fossae, Tyrrhenus Mons, volcanic ash, volcanics
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Many bedrock plains are clastic rocks, not lavas
The Martian surface is dominated by loose dust, sands, and rocks, but high spatial resolution imaging has permitted the detection of numerous flat-lying exposures of ancient, intact bedrock. These “bedrock plains” have previously been interpreted as lava sequences, perhaps similar … Continue reading
Posted in Reports
Tagged airfall deposits, bedrock, lava plains, plains, regolith, sedimentary debris, volcanic ash
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Thaumasia’s volcanic clues to Mars evolution
Researcher Don Hood from Louisiana State University and colleagues at collaborating universities studied an unusual region on Mars — an area with high elevation called Thaumasia Planum. They analyzed the geography and mineralogy of this area they termed Greater Thaumasia, which … Continue reading
Posted in Reports
Tagged Gamma Ray Spectrometer, GRS, Syria-Thaumasia, Thaumasia Planum, volcanic ash
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Supervolcanos in Arabia on Mars: Update
The idea of giant volcanos erupting in Arabia was proposed by Joseph Michalski (Planetary Science Institute) in a talk at the Lunar and Planetary Science Conference in March 2013. Michalski and coauthor Jacob Bleacher (NASA Goddard Space Flight Center) have … Continue reading
Posted in Reports
Tagged Arabia Terra, Eden Patera, Euphrates Patera, explosive volcanism, Ismenia Patera, Oxus Cavus, Oxus Patera, Semeykin Crater, Siloe Patera, supervolcanos, volcanic activity, volcanic ash, volcanism, volcanos
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Explosive eruptions in dense ancient atmospheres
Explosive volcanic eruptions on an earlier Mars with a thicker atmosphere would have scattered fine ash (pyroclastic debris) mainly east or west of the volcano, a new study finds. Also, a denser ancient atmosphere supports the addition of Arsia and … Continue reading
Posted in Reports
Tagged Apollinaris Mons, Arsia Mons, atmosphere, Medusae Fossae Formation, Pavonis Mons, pyroclastic eruptions, volcanic ash, volcanos
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