Eridania Basin, Mars, satellite image

Eridania Basin, Mars, satellite image

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Credit: NASA/JPL-Caltech/Univ. of Arizona/SCIENCE PHOTO LIBRARY

Caption: Eridania Basin. Satellite image of ridges in the Eridania Basin on the surface of Mars. There is mounting evidence that this region at the head of Ma'adim Vallis may have been the site of an ancient inland sea. This site presents interesting mineralogical and geological evidence for the past existence of a large aqueous system on Mars that could have been long lived, and may have been well suited for ancient life and almost certainly contains important clues about the ancient climate. The ridges in this image could be cemented and topographically inverted fractures, although other origins (such as eskers, channels, or volcanic dikes) cannot be ruled out. Imaged by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars.

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