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Exploring Mars with rovers Curiosity and Opportunity

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This set of NASA handout images compares the Link outcrop of rocks on Mars (l.) with similar rocks seen on Earth (r.). The image of Link taken September 2, 2012 and released September 27, 2012, was obtained by NASA's Curiosity rover and shows rounded gravel fragments, or clasts, up to a couple inches (few centimeters), within the rock outcrop. The outcrop characteristics are consistent with a sedimentary conglomerate, or a rock that was formed by the deposition of water and is composed of many smaller rounded rocks cemented together. A typical Earth example of sedimentary conglomerate formed of gravel fragments in a stream is shown on the right.


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