Tag Archives: graben

THEMIS: Channel flow in Sacra Fossae

THEMIS Image of the Day, August 16, 2018. The right-angle intersection of the depressions in this VIS image is one of the graben that form Sacra Fossae. The fossae are located on Sacra Mensa, near the beginning of Kasei Valles. … Continue reading

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THEMIS: Fault-edged blocks of Sacra Fossae

THEMIS Image of the Day, August 2, 2018. The right angle intersections in this VIS image are some of the graben that form Sacra Fossae. The fossae are located on the margin of Lunae Planum near the beginning of Kasei … Continue reading

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THEMIS: Giant pit crater collapse on Alba Mons

THEMIS Image of the Day, July 10, 2018. This VIS image is located on the eastern flank of Alba Mons. Linear faults and graben surround the volcano aligned north/south, intersecting and deflected around the summit. The large graben is called … Continue reading

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THEMIS: Pavonis Mons flank meets volcanic plains

THEMIS Image of the Day, July 4, 2018. Today’s VIS image is of the eastern flank of Pavonis Mons where the volcano meets the surrounding volcanic plains. The arced features towards the top of the image are fractures and lava … Continue reading

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THEMIS: Cerberus Fossae, source of floods

THEMIS Image of the Day, May 22, 2018. Today’s VIS image shows a section of Cerberus Fossae. Located southeast of the Elysium Planitia volcanic complex, the linear graben was created by tectonic forces related to the volcanic activity. The fossa … Continue reading

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THEMIS: Lava flows chopped by graben in Olympica Fossae

THEMIS Image of the Day, May 21, 2018. The linear channel in the bottom half of this VIS image is part of Olympica Fossae. Olympica Fossae is a complex channel form located on the Tharsis plains between Alba Mons and … Continue reading

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THEMIS: Volcanic fissure in Labeatis Fossae

THEMIS Image of the Day, May 8, 2018. The feature that crosses this VIS image is a graben. Graben are formed by tectonic action, where a block of material moves downward between a pair of faults. The northern part of … Continue reading

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THEMIS: Big blocky faults in Sacra Fossae

THEMIS Image of the Day, April 19, 2018. Located on the western margin of Lunae Planum, Sacra Fossae is a group of linear depressions. The right angle turns and uniform width seen in this VIS image indicate that these channels … Continue reading

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THEMIS: Channels cutting across channels in Olympica Fossae

THEMIS Image of the Day, April 12, 2018. Olympica Fossae is a complex channel located on the volcanic plains between Alba Mons and Olympus Mons. The sinuosity of the large channel in the middle of the image indicates that this … Continue reading

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HiRISE: The exposed exterior of a modified crater in Tantalus Fossae

The exposed exterior of a modified crater in Tantalus Fossae. Many craters in this area have been extensively modified, but few are sitting on the edge of a graben like this. This position exposes parts of the crater exterior and … Continue reading

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