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Lakebeds in Holden Crater - NASA Mars images

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Lakebeds in Holden Crater - NASA Mars images

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Summary

Holden Crater was once filled by at least two different lakes. The sediments deposited in those lakes are relatively light-toned where exposed, as seen in this observation from NASA's Mars Reconnaissance Orbiter. Each layer represents a different point in time and perhaps a changing environment for Martian life, if it existed. The elongated ridges with sharp crests are sand dunes. The map is projected here at a scale of 25 centimeters (9.8 inches) per pixel. [The original image scale is 25.9 centimeters (10.2 inches) per pixel (with 1 x 1 binning); objects on the order of 78 centimeters (30.7 inches) across are resolved.] North is up. https://photojournal.jpl.nasa.gov/catalog/PIA21587
NASA/JPL-Caltech/Univ. of Arizona

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Date

13/04/2017
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Source

NASA
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Public Domain Dedication (CC0)

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