Mars HiRise Athabasca Valles
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Mars HiRise Athabasca Valles

November 19, 2012
This image completes a mosaic of images covering a collection of streamlined islands in Athabasca Valles. Streamlined islands form by a rapid erosive flow (catastrophic flooding) around an obstacle such as a resistant rock outcrop or surface armored by impact ejecta. Examination of the margins of the islands can show evidence of terraces as in this image. Each terrace may indicate a different flow event or flood level, and can be used to reconstruct the history of flood events. Written by: Mike Mellon (audio by Tre Gibbs) (14 November 2012) ESP_028519_1895 Image credit-NASA/JPL/University of Arizona

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