Arcadia Planitia

It dates from the Amazonian period's arcadia formation's lava flows and small cinder cones.

These features indicate glaciation and appear similar to those on Earth, where the freezing and thawing of water located between ground layers contributes to the slow flow of near-surface materials.

This supports the proposition that ground ice exists in the near-surface of Arcadia Planitia, and therefore this location is an area of interest for potential exploration missions.

In this region are many expanded secondary craters that probably form from impacts that destabilize a subsurface layer of excess ice, which subsequently sublimates.

Martian gullies are small, incised networks of narrow channels and their associated downslope sediment deposits, found on the planet of Mars.

First discovered on images from Mars Global Surveyor, they occur on steep slopes, especially on the walls of craters.

Wide view of group of gullies, as seen by HiRISE under HiWish program. Note that part of this image is enlarged in the following image.