Dark Light
We’ve come to understand in recent years that about a third of Mars has ice just below the surface.

Many impact craters in the mid-latitudes are filled with smooth material that is probably ice covered with a little dirt. Part of one of these filled craters appears in this HiRISE image and has an interesting feature about 250 meters (800 feet) across, near the image center.

What looks like might have been a small impact crater now has a straight edge with a steep cliff on its southern side. This north-facing cliff appears to expose icy material that’s similar to other pole-facing scarps showing buried ice elsewhere on the planet. These cliffs give us a cut-away view of the buried ice in that location and can help answer questions about what the Martian climate was like when this ice formed.

Image: NASA/JPL/University of Arizona https://www.uahirise.org/hipod/ESP_070939_2305
Related Posts

A Scarp in the Arabia Region

Pictured here appears to be the edge of a blast radius of a large meteorite impact crater with smaller and more recent cratering interrupting its circumference.

A Tale of Collapse Terrain

North of Ganges Chasma lies Orson Welles Crater, whose floor contains broken up blocks we call chaotic terrain and which is the source for the major outflow channel Shalbatana Vallis.

An Impact Crater within Nanedi Valles

With this image, we can cross-dating the relative age of the impact with that of the valley system, as well as learning more about the fluvial and morphology characteristics of area.