Tag Archives: polygonal ridges

HiRISE: Polygonal ridges near the Medusae Fossae formation

Polygonal ridges near the Medusae Fossae formation. The major hypothesis for these ridges is that they are basaltic, made from intruding lavas. Beautiful Mars series.

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Blade-like ridges on Mars have diverse origins

Thin, blade-like walls, some as tall as a 16-story building, dominate a previously undocumented network of intersecting ridges on Mars, found in images from NASA’s Mars Reconnaissance Orbiter. The simplest explanation for these impressive ridges is that lava flowed into … Continue reading

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