Tag Archives: calderas

THEMIS: Biblis Patera

THEMIS Image of the Day, August 21, 2019. Today’s VIS image shows Biblis Patera, the summit caldera of the volcano Biblis Tholus. This volcano is located west of Pavonis Mons and is just one of the numerous volcanoes found in … 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: A caldera’s steep slopes

This image shows part of the steep wall of the caldera (a large volcanic crater) at the top of Ascraeus Mons, one of Mars’ giant volcanoes. We can see chutes carved into the soft dust that has built up on … Continue reading

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THEMIS: Over the summit of Pavonis Mons

THEMIS Image of the Day, September 28, 2018. Today’s VIS image crosses the flanks and summit of Pavonis Mons. Calderas are down-dropped areas which collapse when lava inside the volcano withdraws, removing its support for the heavy rock layers above. … Continue reading

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THEMIS: Ice-rich clouds over Arsia Mons’ caldera

THEMIS Image of the Day, September 19, 2018. The THEMIS VIS camera contains 5 filters. The data from different filters can be combined in multiple ways to create a false color image. These false color images may reveal subtle variations … 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: Flows on the caldera floor of Arsia Mons

THEMIS Image of the Day, January 2, 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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