Tag Archives: graben

HiRISE: Irregular crater intersecting graben in Tractus Albus

This crater, of which only a small portion is visible in the full HiRISE image, is very irregularly shaped and might suggest that some underlying liquid was present that made it so elongated after the initial impact. Another reason for … Continue reading

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THEMIS: Acheron Catena

THEMIS Image of the Day, March 26, 2014. This VIS image shows several of the graben (fault bounded depression) that are part of Acheron Catena. Most of the lava flows in the image originated at Alba Mons and predate the … Continue reading

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HRSC: Daedalia Planum closeup

Close-up view of the two dominant lava flows that reach the foot of the highland terrain (seen at the top of the image in this orientation). The older of the two eruptions produced the smooth lava surface to the south … Continue reading

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THEMIS image: Rubicon Valles

THEMIS Image of the Day, February 25, 2014. The multiple channels seen in this VIS image dissect the northwestern margin of Alba Mons. The channels are called Rubicon Valles. More THEMIS Images of the Day by geological topic.

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THEMIS image: Alba Fossae

THEMIS Image of the Day, January 28, 2014. Today’s VIS image shows a portion of Alba Fossae, located on the northwestern margin of Alba Mons. Small channels are also visible cutting across the grabens.

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THEMIS image: Labeatis Fossae

THEMIS Image of the Day, January 27, 2014. The fractures in this VIS image are part of Labeatis Fossae. The large impact crater was formed after the fractures.

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Watch for falling rocks

A new investigation of Cerberus Fossae using HiRISE images shows that Mars is probably seismically active now or in the recent past. The clues are tracks left by boulders as they rolled downhill. Gerald Roberts (University of London) and colleagues … Continue reading

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