This image suggestion outlines a contact between gypsum-rich dunes in Olympia Undae and flat-lying layers of the basal (or bottom) unit. Our goal is to look for a stratigraphic and compositional comparison between the dunes and the basal unit.
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Image: NASA/JPL/University of Arizona https://www.uahirise.org/hipod/ESP_070833_2605
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Active High-Latitude Dune-Gullies
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Elongated Dunes
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