Dark Light

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.


Image: NASA/JPL/University of Arizona https://www.uahirise.org/hipod/ESP_070833_2605
Related Posts

Wind Carved Rock

The distinctively fluted surface and elongated hills in this image in Medusae Fossae are caused by wind erosion of a soft fine-grained rock.

Dunes in Meridiani Planum

HiRISE monitors dune fields across Mars to track how they are changing. The mobile sand also cleans dust off of the bedrock in inter-dune areas, providing good views of the bedrock structures and colors.