Tag Archives: south polar layered deposits

THEMIS: Frost and south polar trough layers

THEMIS Image of the Day, June 26, 2017. Do you see what I see? Don’t be afraid, but it looks like a ghost! (THEMIS Art #133) More THEMIS Images of the Day by geological topic.

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HiRISE: Erosion of the edge of the south polar layered deposits

This oblique view of the sloping edge of the stack of icy layers over the South Pole has some interesting morphologies. The slope appears to be eroding from a combination of landslides, block falls, and sublimation. The bright icy exposure … Continue reading

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THEMIS: Fragments of a climate history book

THEMIS Image of the Day, May 8, 2017. Today’s VIS image shows layered material near the south polar cap. Such layers contain a detailed, if partial, history of the martian climate. Scientists would love to read this “book,” however fragmentary, … Continue reading

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HiRISE: Silence of the south polar layered deposits

Silence of the south polar layered deposits. Beautiful Mars series.

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HiRISE: South polar spiral

This hill in the South Polar layered deposits has influenced the erosion of the icy layers. The hill protects the layers from erosion, so the pattern of erosion to the sides of the hill forms a beautiful spiral pattern. [More … Continue reading

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HiRISE: Is that an impact crater?

This image was acquired to take a closer look at a circular feature that might be an impact structure on the South Polar layered deposits. Measuring the sizes and frequency of impact craters provides a constraint on the age of … Continue reading

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THEMIS: South polar cap layers

THEMIS Image of the Day, March 3, 2017. This VIS image shows the layering of the South Polar cap of Mars. The image is located at the margin between the cap ice and the surrounding plains (bottom of image). More … Continue reading

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THEMIS: Pages from the south polar climate history book

THEMIS Image of the Day, February 22, 2017. Today’s VIS image shows part of the south polar cap. It is now summer in the region and the surface frosts are gone. The layers of ice comprising the cap are now … Continue reading

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HiRISE: How gas carves channels

A layer of dry ice covers the South Polar layered deposits every winter. In the spring, gas created from heating of the dry ice escapes through ruptures in the overlying seasonal ice, entraining material from the ground below. The gas … 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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