| The Richness of Layers
This stunning image features dozens of layers in the walls of a graben on the flanks of Arsia Mons. These layers could be yet unmapped volcanic units (lavas or ash deposits) and their identification can lead to a greater understanding of the history of this volcanic terrain. Material from this wall likely mantled the ice-rich deposits on the graben floor, and a 3D model can also characterize erosion patterns on the wall. |
| Circular Mystery
This image features an interesting circular outcrop of rock that appears dark in infrared but in Context Camera data, appears to be a much rougher terrain surrounding a knob. It is possible this is the remnant of an ancient cinder cone and surrounding lava field. The area might be on a postulated shield volcano with its caldera to the north. Or is it a deposit of minerals from fumaroles similar to those found near Home Plate that the Spirit rover explored? | 
| Layers in Noctis Labyrinthus
The objective of this observation is to examine layers in Noctis Labyrinthus. These layers are located along a narrow canyon. Noctis Labyrinthus is part of a complex feature whose origin lies in the swelling of the crust owing to tectonic and volcanic activity in the Tharsis region, home to Olympus Mons and other large volcanoes. | 
| An Eroded Step Massif in Cydonia Mensae
From HiWish: “Looking along the images of this entire area, I’m struck by how much these stepped massifs look as though they may have been islands in a shallow sea. I’ll be scanning and requesting images for what I suspect to be a former coastline and looking at these massifs for further clues. There is not much HiRISE coverage of this area, and it’s pretty large and covered with features like this.” | 
| Inverted Terrain near Granicus Valles
The objective of this observation is to examine possible inverted terrain. The image shows a curved ridge and a group of short ridges that makes a pattern resembling a branching stream drainage. Granicus Valles is located just west of the Elysium Mons volcanic complex and was likely formed by the flow of lava rather than water. |
