Tag Archives: polygonal terrain

HiRISE: Within a crater in the Southern Highlands

Within a crater in the Southern Highlands. This is a very ancient crater, long filled-in. You can see polygonal patterns in the terrain, mainly due to the contraction of subsurface ice as the seasons change. Beautiful Mars series.

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HiRISE: Rectangles with wiggly sides

Ground that has a lot of water ice mixed with dirt tends to crack in polygonal patterns bounded by short straight channels. In the South Polar region of Mars this type of terrain may be covered by a seasonal polar … Continue reading

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HiRISE: Polygonal network of exposed ridges

Polygonal network of erosionally exposed ridges. Beautiful Mars series.

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HiRISE: Frost-enhanced landscape

The arc of hills in this image is the rim of an old and infilled impact crater. The sediments that were deposited within the crater have since formed polygonal cracks due to repeated cycles of freezing and thawing. The process … Continue reading

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HiRISE: Polygonal fracturing on crater ejecta

Polygonal fracturing on ejecta from a crater in the Arabia region. Beautiful Mars series.

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HiRISE: Polygons in an impact crater

The Slayer Time, Ancient of Days, come hither to consume. Polygons in an impact crater. Beautiful Mars series.

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HiRISE: Shield wall

Shield wall — Wonderful terrain the Martian South Pole, with terrific examples of sublimation and polygonal cracks from expansion and contraction due to seasonal changes. Beautiful Mars series.

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HiRISE: Polygonal cracks meet south polar layered deposits

Exposure of south polar layered deposits. Beautiful Mars series.

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HiRISE: Seasonal frost enhances polygon visibility

Unleash the Polygons! Beautiful Mars series.

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HiRISE: Strange cones and flows

The north end of this long image shows a lava surface in southern Elysium Planitia. Small cones are common on the extensive young flood lavas in this region. Here, the cones are larger than usual, perhaps approaching cinder cone sizes. … Continue reading

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