Tag Archives: ground ice

ExoMars poised to start science mission

The ExoMars orbiter will soon begin its search for gases that may be linked to active geological or biological activity on the Red Planet. The Trace Gas Orbiter has reached its final orbit after a year of ‘aerobraking’ that ended … Continue reading

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THEMIS: Yuty Crater ejecta

THEMIS Image of the Day, March 26, 2018. Off the image to the right is Yuty Crater, located between Simud and Tiu Valles. The crater ejcta forms the large lobes along the right side of this VIS image. This type … Continue reading

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Long-term preservation of subsurface ice on Mars

Layered-ejecta craters on Mars that are associated with impacts into rock mixed with volatiles have been formed throughout the planet’s history indicating the long-term preservation of subsurface ice. Water ice on Mars is not currently stable in the near-equatorial regions … Continue reading

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HiRISE: Icy layers in craters

Scientists now realize that ice is very common on the Martian surface. It often fills up craters and valleys in the mid-latitudes in older climates, although when it’s covered in dust it can be hard to recognize. Today the climate … Continue reading

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HiRISE: Hexagons in icy terrain

Ground cemented by ice covers the high latitudes of Mars, much as it does in Earth’s cold climates. A common landform that occurs in icy terrain are polygons. Polygonal patterns form by winter cooling and contraction cracking of the frozen … Continue reading

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Creepy stuff: possible solifluction on Mars

Planetary Geomorphology Image of the Month, November 30, 2017: Andreas Johnsson (University of Gothenburg, Sweden). Small-scale lobes on Mars (Fig. 1) are tens to hundreds of meters wide and consist of an arcuate frontal riser that is a meter to … Continue reading

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Ground ice lubricated Valles Marineris landslides

How good is your Martian geography? Does Valles Marineris ring a bell? This area is known for having landslides that are among the largest and longest in the entire solar system. They make the perfect object of study due to … Continue reading

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HiRISE: A collapsed crater rim

The eastern rim of this small 3.5-kilometer crater appears to have collapsed into a much larger crater (about 14-kilometers wide). The larger crater has a large ice flow around its central peak, and is non-circular, with large blocks further suggesting … Continue reading

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HiRISE: Candidate Red Dragon landing site

Candidate Red Dragon landing site in Arcadia Planitia. There are indications of shallowly buried remnant ice in this area. Beautiful Mars series.

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New look at old data points to subsuface equatorial ice

Scientists taking a new look at older data from NASA’s longest-operating Mars orbiter have discovered evidence of significant hydration near the Martian equator — a mysterious signature in a region of the Red Planet where planetary scientists figure ice shouldn’t … Continue reading

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