Tag Archives: Tharsis

HiRISE: Pitted material and mounds

Pitted material and mounds in Chryse Planitia. This rough-looking material has many meter-length pits. What exactly is this stuff? Chryse Planitia shows evidence of water erosion in the past, and is the bottom end for many outflow channels from the southern … Continue reading

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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

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THEMIS: High on the east flank of Pavonis Mons

THEMIS Image of the Day, October 11, 2018. This false-color VIS image shows the eastern flank of Pavonis Mons. The darker streaks are created by wind action, and the curving lines are faults produced when the volcano “relaxed” under the … Continue reading

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THEMIS: Intersecting lava channels & tectonics

THEMIS Image of the Day, August 27, 2018. The Tharsis region contains both large volcanoes and extensive lava plains. Most of the channel features in this region were formed by the flow of lava rather than the flow of water. … Continue reading

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THEMIS: Impact crater on volcanic plains

THEMIS Image of the Day, August 23, 2018. This VIS image shows an unnamed crater located northeast of Ascraeus Mons, on the volcanic plains of the Tharsis region. The rim has several concentric ridges. There are multiple layers of ejecta, … Continue reading

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HiRISE: Dusty lava flows

Dusty lava flows. Try not to get choked up.

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THEMIS: Big step-off at Olympus Rupes

THEMIS Image of the Day, August 20, 2018. Olympus Rupes is the name of the large escarpment surrounding Olympus Mons. The escarpment is a cliff where there is a large elevation change over a short distance. The elevation change from … Continue reading

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HiRISE: Source of flow east of Olympus Mons

Source of flow to the east of Olympus Mons. Here we see part of a linear depression with branching segments in Amazonian volcanic plains east of Olympus Mons. The flow source from this feature that exhibit volcanic and/or fluvial characteristics. … Continue reading

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THEMIS: Daedalia Planum’s lava flows

THEMIS Image of the Day, July 11, 2018. The lava flows in this VIS image originate at Arsia Mons. Arsia Mons in the southermost of the three large Tharsis volcanoes. More THEMIS Images of the Day by geological topic.

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Mars Express: From horizon to horizon

Fifteen years ago, ESA’s Mars Express was launched to investigate the Red Planet. To mark this milestone comes a striking view of Mars from horizon to horizon, showcasing one of the most intriguing parts of the martian surface. On 2 … Continue reading

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