Gullies on the Wall of an Unnamed Crater in Utopia Planitia
This enhanced-color image from NASA's Mars Reconnaissance Orbiter shows gullies in the northern wall of an unnamed crater in Utopia Planitia. The banked, sinuous shape of the gully channels suggest that water was involved in their formation.
This scene captured by NASA's Mars Reconnaissance Orbiter includes chaotic deposits with a wide range of colors. The deposits are distinctive with both unique colors and small-scale textures such as fracture patterns.
A Possible Landing Site for the ExoMars Rover in Aram Dorsum
This image from NASA's Mars Reconnaissance Orbiter is part of a proposed landing site in Aram Dorsum for the ExoMars Rover, planned for launch in 2018. Upper layers of light toned sediments have been eroded, leaving a lower surface which appears dark.
Most larger chasmata contain kilometer-thick light-toned layered deposits composed of sulfates. However, some of the chasmata, like Ius Chasma shown in this image from NASA's Mars Reconnaissance Orbiter, lack these deposits or have much thinner deposits.
Seasonal frost commonly forms at middle and high latitudes on Mars, much like winter snow on Earth. However, on Mars most frost is carbon dioxide (dry ice) rather than water ice. This image is from NASA's Mars Reconnaissance Orbiter.
Clay-Rich Terrain in Oxia Planum: A Proposed ExoMars Landing Site
Oxia Planum is an ancient (Noachian epoch) terrain situated to the east of Chryse Planitia at about 18 degrees north. This image from NASA's Mars Reconnaissance Orbiteris of a proposed ExoMars Landing Site.
A pedestal crater is when the ejecta from an impact settles around the new crater and is more erosion-resistant than the surrounding terrain as seen in this image from NASA's Mars Reconnaissance Orbiter.
A delta is a pile of sediment dumped by a river where it enters a standing body of water. Evidence for deltas that formed billions of years ago on Mars has been mounting in recent years. This image is from NASA's Mars Reconnaissance Orbiter.
The objective of this observation from NASA's Mars Reconnaissance Orbiter is to examine a light-toned deposit in a region of what is called 'chaotic terrain.' Some shapes suggest erosion by a fluid moving north and south.
Gully and defrosting activity have been visible here along the edge of a dune field, along with blocks of frost. Observations from NASA's Mars Reconnaissance Orbiter of the same area help check for repeat activity.
Researchers have found deposits of impact glass preserved in Martian craters, including Alga Crater, shown here. The detection is based on data from the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) on NASA's Mars Reconnaissance Orbiter.
This image from NASA's Mars Reconnaissance Orbiter shows a landscape that is pervasively eroded, right up to the tops of the ridges, with channels extending down into depositional fans much like alluvial fans in the Mojave Desert.
This image from NASA's Mars Reconnaissance Orbiter covers layered sedimentary rocks on the floor of an impact crater north of Eberswalde Crater. There may have been a lake in this crater billions of years ago.
Seasonal flows called recurring slope lineae (RSL) grow down warm slopes in the summer, fade when they become inactive, then re-form the following year when the slopes warm up again from the Sun. This observation is from NASA's Mars Reconnaissance Orbiter