This observation from NASA's Mars Reconnaissance Orbiter spacecraft is of Noctis Labyrinthus, a highly tectonized region immediately to the west of Valles Marineris. It formed when Mars' crust stretched itself apart.
The giant sand dunes in Kaiser Crater, seen by NASA's Mars Reconnaissance Orbiter, experience gully erosion of the steep slip faces every year in late winter as the sun warms these slopes and seasonal carbon dioxide frost sublimates.
The dunes shown here, as seen by NASA's Mars Reconnaissance Orbiter spacecraft, form distinct dots and dashes. The 'dashes' are linear dunes formed by bi-directional winds, which are not traveling parallel to the dune.
Mars Atmospheric Temperature and Dust Storm Tracking
This graphic overlays Martian atmospheric temperature data as curtains over an image of Mars taken during a regional dust storm. Temperature data and global image were both recorded on Oct. 18, 2014, by NASA's Mars Reconnaissance Orbiter spacecraft.
Seasonal Temperature Pattern Indicating Martian Dust Storms
This graphic shows Martian atmospheric temperature data related to seasonal patterns in occurrence of large regional dust storms. The data shown here were collected by the Mars Climate Sounder instrument on NASA's Mars Reconnaissance Orbiter.
These North Polar layered deposits, composed of ice, captured by NASA's Mars Reconnaissance Orbiter spacecraft, show what looks like drag folds, where rock layers bend (fold) before they break in a fault.
There is a circular feature in this observation from NASA's Mars Reconnaissance Orbiter spacecraft that appears to stand above the surrounding terrain. This feature is probably an inverted crater that was filled in with sediment.
This image captured by NASA's Mars Reconnaissance Orbiter spacecraft targets a 3-kilometer diameter crater that occurs within the ejecta blanket of the much older Bakhuysen Crater, a 150-kilometer diameter impact crater in Noachis Terra.
This image montage features a two-dimensional radar cross section of Mars' north polar cap collected by SHARAD instrument on NASA's Mars Reconnaissance Orbiter spacecraft (top), and a color image mosaic of the polar cap from NASA's Viking project (bottom)
This image from NASA's Mars Reconnaissance Orbiter spacecraft the valley networks on Mars are terrains eroded by flowing water billions of years ago. Where bedrock is well exposed, a variety of colors due to altered minerals and polygonal patterns.
Bedrock Exposures on the Floor of Bakhuysen Crater
This image from NASA's Mars Reconnaissance Orbiter spacecraft shows an exposure of bedrock on the floor of Bakhuysen Crater, an impact crater in Noachis Terra. The bedrock is highly fragmented and fractured.
This image from NASA's Mars Reconnaissance Orbiter spacecraft shows a roughly 3-kilometer impact crater, formed on the sloping walls of Tithonium Chasma, part of the large Valles Marineris canyon system.
A One-Kilometer Crater on the Floor of Saheki Crater
This image captured by NASA's Mars Reconnaissance Orbiter spacecraft shows several smaller craters that formed on the floor of Saheki Crater, an 85-kilometer diameter impact crater north of Hellas Basin.
Melas Chasma is the widest segment of Valles Marineris, the largest canyon in the Solar System as seen by Mars Reconnaissance Orbiter spacecraft. In this region, hydrated sulfate salts have been detected.
Evidence Builds for Old Under-Ice Volcanoes on Mars
These mountains are in a region called Sisyphi Montes. The base image from NASA's 2001 Mars Odyssey shows a portion of the region about 130 miles. Red outlines indicate possible subglacial volcanic structures. MRO's CRISM data are at upper right.
This image from NASA's Mars Reconnaissance Orbiter spacecraft was acquired to look for frost on these generally equator-facing slopes on Mars, which are visible in the shadows after enhancing the brightness levels.