Tag Archives: north polar layered deposits

Radar gives new info on Mars climate change, polar cap ages

Three-dimensional (3-D) subsurface radar volumes generated from thousands of 2-D radar profiles are revealing new information about the polar regions of Mars, including more accurate mapping of CO2 and water ices, the discovery of buried impact craters, and new elevation … Continue reading

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HiRISE: North polar layers: streaking and unconformity

In geology, an unconformity is a buried erosion surface, where the bedding layers don’t match. It doesn’t mean a mismatch in attitudes and beliefs, with rebellious behavior like streaking. But Mars does have streaking of a different kind, from the … Continue reading

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THEMIS: North polar ice cap troughs and layers

THEMIS Image of the Day, June 28, 2017. Do you see what I do? Looks like a person’s profile at the bottom of this image. (THEMIS Art #135) More THEMIS Images of the Day by geological topic.

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HiRISE: North polar layers

The North Polar layered deposits are a 3-kilometer thick stack of dusty water ice layers that are about 1000 kilometers across. The layers record information about climate stretching back a few million years into Martian history. In many locations erosion … Continue reading

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HiRISE: Polar pits — are they active?

This 2008 image shows a portion of the North Polar layered deposits with lines of very small pits, only about 1 meter in diameter. Such small pits should be quickly filled in by seasonal ice and dust, so their existence … Continue reading

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How Mars got its layered north polar cap

One of Mars’s most striking features is the giant dome of layered ice and dust at its northern pole, analogous to Earth’s ice sheets. Scientists have long debated what formed this dome, thought to have begun developing about 5 million … Continue reading

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3D images reveal Mars polar ice cap features

Three-dimensional subsurface images are revealing structures within the Martian polar ice caps, including previously obscured layering, a larger volume of frozen carbon dioxide contained in the south polar cap, and bowl-shaped features that may be buried impact craters within both … Continue reading

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HiRISE: North polar cap layers and ledges

At the edge of Mars’ permanent North Polar cap, we see an exposure of the internal layers, each with a different mix of water ice, dust and dirt. These layers are believed to correspond to different climate conditions over the … Continue reading

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HiRISE: Deceptively smooth

Deceptively smooth — North Polar layered deposits with generous amounts of carbon dioxide frost. Beautiful Mars series.

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HiRISE: Crater on north polar layered deposits

109-meter diameter crater on north polar layered deposits. Beautiful Mars series.

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