Tag Archives: calderas

Arsia Mons turned off its volcanic activity about 50 million years ago

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

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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THEMIS: Arsia Mons summit caldera

THEMIS Image of the Day, July 11, 2016. Today’s VIS image shows part of the summit caldera of Arsia Mons. More THEMIS Images of the Day by geological topic.

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HiRISE: Cratered summit of a knob

There are many knob formations in the southeastern Acidalia region of Mars. All show a hilltop crest except one which has a summit crater that resembles a cone volcano. Knobs like these likely formed from interactions between water ice and … Continue reading

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THEMIS: Olympus Mons false color

THEMIS Image of the Day, January 5, 2015. 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: Arsia Mons false color

THEMIS Image of the Day, December 3, 2014. This false color image shows part of the summit caldera of Arsia Mons. The mottled bluish tones are from clouds. More THEMIS Images of the Day by geological topic.

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THEMIS: Pavonis Mons

THEMIS Image of the Day, September 2, 2014. This VIS image shows the summit caldera of Pavonis Mons. More THEMIS Images of the Day by geological topic.

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THEMIS image: Olympus Mons summit caldera

THEMIS Image of the Day, February 19, 2014. This VIS image shows the central portion of the complex caldera at the summit of Olympus Mons. More THEMIS Images of the Day by geological topic.

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THEMIS image: Olympus Mons summit

THEMIS Image of the Day, February 18, 2014.┬áToday’s VIS image shows the eastern portion of the complex caldera at the summit of Olympus Mons.┬áMore THEMIS Images of the Day by geological topic.

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THEMIS image: Ascaeus Mons summit

THEMIS Image of the Day, February 17, 2014. This VIS image shows the eastern part of the complex caldera at the summit of Ascraeus Mons. More THEMIS Images of the Day by geological topic.

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