Tag Archives: calderas

THEMIS: Morning sunlight on Pavonis Mons caldera

Posted on November 10, 2017 by rburnham

THEMIS Image of the Day, November 10, 2017. This image shows the central part of the smaller summit caldera on Pavonis Mons. On the top side of the caldera is a complex region of fault related collapse of the wall … Continue reading →

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THEMIS: Faults weaken summit caldera wall on Pavonis Mons

Posted on November 8, 2017 by rburnham

THEMIS Image of the Day, November 8, 2017. This image shows the western part of the smaller summit caldera on Pavonis Mons. On this side of the caldera is a complex region of fault related collapse of the wall of … Continue reading →

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THEMIS: Summit caldera of Pavonis Mons

Posted on November 7, 2017 by rburnham

THEMIS Image of the Day, November 7, 2017. This image shows part of the smaller summit caldera on Pavonis Mons. This caldera is approximately 5km deep. Near the bottom of the image is a region where part of the caldera … Continue reading →

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THEMIS: Summit caldera edge, Pavonis Mons

Posted on November 2, 2017 by rburnham

THEMIS Image of the Day, November 2, 2017. This image shows part of the two summit calderas of Pavonis Mons. The surface in the majority of the image is the floor of the larger caldera. The smaller caldera occupies the … Continue reading →

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THEMIS: Secondary caldera atop Ascraeus Mons

Posted on September 8, 2017 by rburnham

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

Posted on September 7, 2017 by rburnham

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: Ring-fault tectonics at Ascraeus Mons caldera

Posted on September 6, 2017 by rburnham

THEMIS Image of the Day, September 6, 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: Into the caldera atop Ascraeus Mons

Posted on August 30, 2017 by rburnham

THEMIS Image of the Day, August 30, 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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Arsia Mons turned off its volcanic activity about 50 million years ago

Posted on March 20, 2017 by rburnham

New NASA research reveals that the giant Martian volcano Arsia Mons produced one new lava flow at its summit every 1 to 3 million years during the final peak of activity. The last volcanic activity there ceased about 50 million … Continue reading →

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THEMIS: Crater & caldera on Elysium Mons

Posted on November 7, 2016 by rburnham

THEMIS Image of the Day, November 7, 2016. This VIS image shows two circular features. The flat floored feature at the top of the image is the summit caldera of Elysium Mons and was formed by volcanic activity. The bowl-shaped … Continue reading →

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