Tag Archives: graben

THEMIS: Pit craters on Ascraeus Mons

THEMIS Image of the Day, September 4, 2017. This image shows a collapse feature on the southeastern flank of the volcano. The circular/scalloped margin of the collapse is typical for ceiling collapse into a lava tube. However, the potential lava … Continue reading

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THEMIS: Tectonics in Sirenum Fossae

THEMIS Image of the Day, May 3, 2017. Today’s false color image shows part of Sirenum Fossae. The linear depressions in this image, called graben, were formed by tectonic activity. The THEMIS VIS camera contains 5 filters. The data from … Continue reading

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THEMIS: Varieties of geo-chaos in Gorgonum

THEMIS Image of the Day, May 2, 2017. Today’s false color image shows part of Gorgonum Chaos. Chaotic regions form when groundwater escapes to the surface, undermining it and causing the ground to collapse. The linear depression at the bottom … Continue reading

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THEMIS: Tempe Fossae graben in false color

THEMIS Image of the Day, April 14, 2017. Today’s false color image shows a section of Tempe Fossae located in Tempe Terra. This is a graben that formed when subsurface forces pulled the ground apart, and a portion of the … Continue reading

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THEMIS: Thaumasia Planum in false color

THEMIS Image of the Day, February 8, 2017. Today’s false color image shows part of the plains of Thaumasia Planum. The THEMIS VIS camera contains 5 filters. The data from different filters can be combined in multiple ways to create … Continue reading

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THEMIS: Faulting & graben in Claritas Fossae

THEMIS Image of the Day, January 13, 2017. Today’s VIS image shows graben called Claritas Fossae. These are caused when the ground is pulled apart, and the land between parallel faults drops down. More THEMIS Images of the Day by … Continue reading

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THEMIS: Tectonics in Sirenum Fossae

THEMIS Image of the Day, January 12, 2017. The linear depressions in this VIS image are graben. Graben are formed from tectonic activity with large blocks of material moving downward between paired faults. The crater in the bottom half of … Continue reading

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THEMIS: Faulting cuts across Gorgonum Chaos

THEMIS Image of the Day, January 3, 2017. Today’s false color image shows part of Gorgonum Chaos. The linear features are tectonic faults, called graben, that are part of Sirenum Fossae. The THEMIS VIS camera contains 5 filters. The data … Continue reading

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THEMIS: ‘Channels’ in Icaria Fossae

THEMIS Image of the Day, December 8, 2016. The channel-like features in this VIS image are tectonic graben. The graben (called Icaria Fossae) are located in Terra Sirenum. The graben are caused by tectonic forces that faulted the bedrock, allowing … Continue reading

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THEMIS: Tectonics showcase in Sirenum Fossae

THEMIS Image of the Day, November 29, 2016. Today’s VIS image shows part of Sirenum Fossae, a large graben on the margin between Terra Sirenum and Daedalis Planum. Grabens are formed by the downward movement of material between parallel tectonic … Continue reading

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