Tag Archives: ground ice

THEMIS: Crosscross tectonics in Lycus Sulci

THEMIS Image of the Day, August 14, 2018. Lycus Sulci is a very complex region surrounding the northern and western flanks of Olympus Mons. This VIS image shows some of the tectonic features found in Lycus Sulci as well as … Continue reading

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THEMIS: Active dunes and ground-ice creep

THEMIS Image of the Day, August 3, 2018. This VIS image is located in the region between northern Terra Sabaea and Utopia Planitia. This unnamed crater contains a small, dark dune field. Darkness suggests the dunes are dust-free, hence probably … Continue reading

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HiRISE: Scarp monitoring

Scarp monitoring. The “blue” in enhanced color could be seasonal frost or perhaps ground ice. We’ll be monitoring this site for one Mars year (two Earth years) to see any changes that helps us figure out what kind of ice this … Continue reading

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THEMIS: The bumpy hills of Arcadia Planitia

THEMIS Image of the Day, June 21, 2018. The hills in this VIS image are part of mound located in Arcadia Plantia. Just west of these hills is a long region of grouped hills called Phlegra Montes. The soft contours, … Continue reading

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THEMIS: Youngish crater in Utopia Planitia

THEMIS Image of the Day, May 17, 2018. This VIS image shows an unnamed crater located in Utopia Planitia. This relatively young crater has a steep inner rim, with floor deposits that originate from the crater rim itself. As craters … Continue reading

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THEMIS: Blast zone at Lonar Crater

THEMIS Image of the Day, May 7, 2018. This VIS image shows the part of the crater rim and ejecta surrounding Lonar Crater in the northern plains of Vastitas Borealis. There is a fine scale, radial grooved outer layer of … Continue reading

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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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