Tag Archives: collapse features

THEMIS: Pit chains and craters on Ascraeus Mons

THEMIS Image of the Day, November 7, 2018. The linear features in this VIS image are located on part of the large flow feature on the southern flank of Ascraeus Mons. The features most likely formed by collapse of the … 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: Pits and channels on Ascraeus Mons

THEMIS Image of the Day, August 28, 2018. This VIS image shows a portion of the northern flank of Ascreaus Mons. Multiple linear depressions cut across the surface lava flows, having formed after the surface in this region. The chains … Continue reading

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THEMIS: Volcanic vent in Arsia Mons caldera

THEMIS Image of the Day, January 5, 2018. This THEMIS image shows part of the southern margin of the summit caldera. This image contains a variety of features representing the major events related to the formation of the volcano. At … Continue reading

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THEMIS: Chains of pit craters near summit of Arsia Mons volcano

THEMIS Image of the Day, January 4, 2018. The three large aligned Tharsis volcanoes are Arsia Mons, Pavonis Mons and Ascraeus Mons (from south to north). There are collapse features on all three volcanoes, on the southwestern and northeastern flanks. … Continue reading

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THEMIS: Pits at caldera’s edge

THEMIS Image of the Day, January 3, 2018. This THEMIS image shows part of the caldera floor of Arsia Mons. It is not uncommon for calderas to have “flat” floors after the final explosive eruption the empties the subsurface magma … Continue reading

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THEMIS: Arsia Mons’ collapse pits

THEMIS Image of the Day, January 1, 2018. This VIS image shows part of the northeastern flank of Arsia Mons at the summit caldera. In this region the summit caldera does not have a steep margin most likely due to … Continue reading

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THEMIS: Secondary caldera atop Ascraeus Mons

THEMIS Image of the Day, September 8, 2017. This image shows part of the complex caldera at the summit of the volcano. Calderas are found at the tops of volcanoes and are the source region for magma that rises from … Continue reading

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THEMIS: Collapse rings in Ascraeus Mons caldera

THEMIS Image of the Day, September 7, 2017. This image shows the eastern part of the complex caldera at the summit of the volcano. Calderas are found at the tops of volcanoes and are the source region for magma that … Continue reading

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THEMIS: Collapse features on flank of Ascraeus Mons

THEMIS Image of the Day, September 5, 2017. This image shows part of the northeastern flank of Ascraeus Mons, along the trend that joins the three large Tharsis volcanoes. The image has a myriad of collapse features from circular to … Continue reading

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