Tag Archives: Tharsis

THEMIS: Ascraeus Mons flank and lava plains

THEMIS Image of the Day, August 1, 2019. This VIS image is located where the southeastern flank of Ascraeus Mons meets the surrounding volcanic plains. Ascraeus Mons is the northernmost of the three large Tharsis volcanoes. Explore more THEMIS Images … Continue reading

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THEMIS: Edge of the caldera on Ascraeus Mons

THEMIS Image of the Day, July 12, 2019. Today’s VIS image is located on the summit of Ascraeus Mons, one of the three large Tharsis region volcanoes. This image clips just the edge of the large summit caldera. Explore more … Continue reading

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THEMIS: Summit caldera of Arsia Mons

THEMIS Image of the Day, June 10, 2019. Today’s VIS image shows part of the summit caldera of Arsia Mons. Arsia Mons is the southernmost of the three large Tharsis volcanoes. Extensive lava plains originated from eruptions of this volcano. … Continue reading

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HiRISE: At the summit of Jovis Tholus

At the summit of Jovis Tholus. Jovis Tholus is a volcano in the Tharsis region and is about 58 kilometers in diameter. Our image only shows a portion of the summit. HiRISE Picture of the Day archive [More at links]

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HiRISE: Me and my little friend

Me and my little friend. A very interesting-looking 5-kilometer crater located in Ascraeus Mons, a large shield volcano located in the Tharsis region of the planet Mars. It is the northernmost and tallest of three shield volcanoes collectively known as … Continue reading

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THEMIS: Lava flow fronts in Daedalia Planum

THEMIS Image of the Day, December 26, 2018. Today’s VIS image shows a small portion of the immense lava flows that originated from Arsia Mons. Arsia Mons is the southernmost of the three large aligned volcanoes in the Tharsis region. … Continue reading

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THEMIS: Tectonics and volcanism in Syria Planum

THEMIS Image of the Day, December 4, 2018. This VIS image shows a linear depression in Syria Planum. Volcanic activity, including broad shield volcanoes and extensive volcanic plains created this region of the Tharsis system south of Noctis Labyrinthus. Linear … Continue reading

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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

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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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