Tag Archives: Sirenum Fossae

THEMIS: Graben in Sirenum Fossae

THEMIS Image of the Day, November 5, 2018. This VIS image shows a section of Sirenum Fossae. The linear features are called graben, and are a sure sign of tension force in the local crust. Graben are formed by blocks … Continue reading

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HiRISE: Inverted and altered light-toned terrain in Sirenum Fossae

Inverted and altered light-toned terrain in Sirenum Fossae. Beautiful Mars series.

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HRSC: Fracture swarms on Mars

These striking features on Mars were caused by the planet’s crust stretching apart in response to ancient volcanic activity. The fractures in the Sirenum Fossae region in the southern hemisphere were imaged by ESA’s Mars Express in March. They extend … 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: 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: 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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THEMIS: Sirenum Fossae

THEMIS Image of the Day, July 3, 2015. The linear features in this VIS image are faults. Where depressions are formed bounded by faulting the feature is called a graben. These faults and graben are part of a large region … Continue reading

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HiRISE: Fresh crater near Sirenum Fossae

This impact crater appears relatively recent as it has a sharp rim and well-preserved ejecta. The steep inner slopes are carved by gullies and include possible recurring slope lineae on the equator-facing slopes. Fresh craters often have steep, active slopes, … Continue reading

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THEMIS: Sirenum Fossae

THEMIS Image of the Day, May 28, 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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