Tag Archives: ice

THEMIS: South polar layers

THEMIS Image of the Day, June 14, 2019. This VIS image shows part of the south polar cap. The numerous layers that comprise the polar cap are readily visible. The cap was built up over millions of years of deposition … Continue reading

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HiRISE: Still life with an impact crater

Still life with an impact crater. Ice fill within a crater in the north polar layered deposits (NPLD) may be a site where accumulation could be observed, helping to settle a long-term problem in Mars polar science: are the NPLD … Continue reading

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Stagnant ice deposits in Terra Cimmeria

[Editor’s note: From a paper by Solmaz Adeli and five co-authors recently published in the Journal of Geophysical Research.] Geomorphological evidence of localized stagnant ice deposits in Terra Cimmeria, Mars • Small debris‐covered stagnant ice deposits (termed valley fill deposits … Continue reading

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THEMIS: South polar ice cap layers

THEMIS Image of the Day, March 15, 2019. This VIS image is located on the South Polar cap. The linear features are the steep side of a polar trough. At troughs the extensive layering of the ice is exposed. The … Continue reading

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HiRISE: The slow charm of brain terrain

You are staring at one of the unsolved mysteries on Mars. This surface texture of interconnected ridges and troughs, referred to as “brain terrain” is found throughout the mid-latitude regions of Mars. (This image is in Protonilus Mensae.) This bizarrely … Continue reading

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Mars Express: Korolev Crater

This image shows what appears to be a large patch of fresh, untrodden snow – a dream for any lover of the holiday season. However, it’s a little too distant for a last-minute winter getaway: this feature, known as Korolev … Continue reading

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Mars Express: Shaping the surface with water, wind, and ice

ESA’s Mars Express has imaged an intriguing part of the Red Planet’s surface: a rocky, fragmented, furrowed escarpment lying at the boundary of the northern and southern hemisphere. This region is an impressive example of past activity on the planet … Continue reading

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HiRISE: Translucent ice

Translucent ice. Also note the polygonal ground, another feature of expanding and contracting subsurface ice. Beautiful Mars series. [More at links]

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Warmer, wetter early Mars: a geological and climatological case

The climate of early Mars is a subject of debate. While it has been thought that Mars had a warm and wet climate, like Earth, other researchers suggested early Mars might have been largely glaciated. A recent study by Ramses … 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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