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Monthly Archives: September 2012
Wet debris flows carved (some) Mars dune gullies
Located west of the big Hellas impact basin in Mars’ southern hemisphere, Russell Crater spreads 135 kilometers (84 miles) wide. A notable feature within it is a broad dune field with a “megadune” heaped up toward the east. The megadune … Continue reading
Posted in Reports
Tagged dunes, gullies, HiRISE, Mars Reconnaissance Orbiter, Russell Crater, water
1 Comment
Dikes: key link between Thaumasia Planum, Tharsis, and Valles Marineris?
The area called Syria-Thaumasia is a big triangular block of Mars just east of three giant Tharsis volcanos: Arsia, Pavonis, and Ascraeus Montes. Valles Marineris bounds the block on the north, while its southwest and southeast sides are defined by … Continue reading
Posted in Reports
Tagged Arsia Mons, Ascraeus Mons, dikes, olivine, Pavonis Mons, Syria-Thaumasia, Tharsis, Thaumasia, Thaumasia Planum, Valles Marineris, volcanism, wrinkle ridges
2 Comments
Steam jets made pits in crater floors
At first glance, the floors of many large impact craters on Mars have areas that appear smooth and flat. But a closer look at some of these flat floors shows a much more rugged landscape, where one small cuplike pit … Continue reading
Methane in a flash
Martian methane is a hot topic because of its potential origin in biological, as well as geological processes. Observations (Earth-based and from Mars orbit) have found only a small quantity of the greenhouse gas in the atmosphere of Mars — … Continue reading
Posted in Reports
Tagged atmosphere, carbon dioxide, dust devils, electrical discharges, HiRISE, Mars Reconnaissance Orbiter, methane, sand storms, water
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