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.
Dark
Light
Image: NASA/JPL/University of Arizona https://www.uahirise.org/hipod/ESP_070833_2605
Related Posts
Inverted Ridges in the Eridania Basin
This closeup of a HiRISE image covers a region in the Eridania Basin that shows interesting inverted ridges (white arrows).
Deposits along the Northern Wall of Melas Chasma
It has been known since the 1970s when the Viking orbiters took pictures of Mars that there are large (i.e., several kilometers-thick) mounds of light-toned deposits within the central portion of Valles Marineris.
Ancient Rivers
Billions of years ago, a river flowed across this scene in Mawrth Vallis. Like on Earth, these river beds can get filled up with rocks that are cemented together.
A Rising Ridge
This obsevation focuses a ridge that is standing above the old lava surface of the floor of Echua Chasma.