Edited Mars Reconnaissance Orbiter image of an alluvial fan in Porter Crater.

Edited Mars Reconnaissance Orbiter image of layered terrain and slopes. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of the slopes of Nectaris Montes, being monitored for changes. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of terrain north of Tempe Terra on Mars.

Edited Mars Reconnaissance Orbiter image of north Syrtis Major on Mars.

Edited Mars Reconnaissance Orbiter</b image of east barchan sand dunes named Romo.

Edited Mars Reconnaissance Orbiter image of pitted material on the crater floor in Mare Tyrrhenum. Color variant.

Edited Mars Reconnaissance Orbiter image of diverse clays near Mawrth Vallis.

Edited Mars Reconnaissance Orbiter image of channels and sand dunes in Aram Chaos on Mars.

Edited Mars Reconnaissance Orbiter image of a crater whose slopes are being monitored (probably for formation of streaks).

Edited Mars Reconnaissance Orbiter image of a six kilometer impact crater on Mars.

Edited Mars Reconnaissance Orbiter image of ejecta from sublimating carbon dioxide in the Martian south polar area. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of a small part of Ganges Chasma.

Edited Mars Reconnaissance Orbiter image of a dust devil seen from the top soon after it formed on Mars. Context image.

Edited Mars Reconnaissance Orbiter image of a circular carbon dioxide ice formation in Mars' south polar region. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of layers in Meridiani Planum. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of sand dunes on what looks like bedrock. Color/processing variant.

Edited Mars Reconnaissance Orbiter PR image of a cliff on Mars with light-toned material on it. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of Curiosity (only a few pixels in size from MRO's perspective) in Gale Crater as she moved to a new location. Inverted grayscale variant.

Edited Mars Reconnaissance Orbiter image of northeast Syrtis Major, which is a candidate landing site for the Mars 2020 mission.

Edited Mars Reconnaissance Orbiter image of a circular feature (not necessarily a crater) in the residual ice cap of the South Pole of Mars. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of frost around gullies on Mars.

Edited Mars Reconnaissance Orbiter image of part of the floor of Hellas Planitia.

Edited Mars Reconnaissance Orbiter image of sand dunes in Schaeberle Crater. Color variant.

Edited Mars Reconnaissance Orbiter image of a six kilometer impact crater on Mars. Color variant.

Edited Mars Reconnaissance Orbiter image of graben in Cerberus Fossae. Color/processing variant.

Image source: photojournal.jpl.nasa.gov/catalog/PIA12956

Original caption: This image shows part of Cerberus Fossae, a long system of extensional (normal) faults arranged in trough-bounding (graben-bounding) pairs. Cerberus Fossae served as the source of a large volcanic eruption that draped Athabasca Valles in lava.

Large boulders that have been dislodged from the graben walls are visible on the floor of Cerberus Fossae. The first subimage shows an example of an approximately 6 meter (20 feet) boulder that left a distinct track as it moved downhill. Although this track is quite clear, ripples inside the track are discernible, indicating that enough time has passed for wind activity to rework loose material into the form of ripples. With close examination of this observation, one can see many boulder tracks, some with ripples and some without ripples.

Wind streaks emanating from impact craters are visible on the plains surrounding Cerberus Fossae. The second subimage shows a false color image of an approximately 33 meters (108 feet) impact crater. Material on the crater floor (blue in the color image) is being moved by the wind out of the crater and across the plains. The wind streaks in this observation indicate that the predominant wind direction in this region is from East to West.

The University of Arizona, Tucson, operates the HiRISE camera, which was built by Ball Aerospace & Technologies Corp., Boulder, Colo. NASA's Jet Propulsion Laboratory, a division of the California Institute of Technology, Pasadena, manages the Mars Reconnaissance Orbiter for the NASA Science Mission Directorate, Washington. Lockheed Martin Space Systems, Denver, is the spacecraft development and integration contractor for the project and built the spacecraft.

Image Credit:

NASA/JPL-Caltech/University of Arizona

Image Addition Date:

2010-03-10

Edited Mars Reconnaissance Orbiter image of intersecting, sinuous lava channels from volcanoes on Mars.

Edited Mars Reconnaissance Orbiter image of stair-stepped hills in Arabia Terra. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of a dune field on a landslide in Ius Chasma. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of a circular feature (not necessarily a crater) in the residual ice cap of the South Pole of Mars. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of dark slopes in east Coprates Montes. Color variant.

Edited Mars Reconnaissance Orbiter image of east barchan sand dunes named Romo.

Edited European Space Agency visualization of the geology of the Oxia Planum candidate landing site for ExoMars. Cropped and color variant.

Edited Mars Reconnaissance Orbiter image of a recent impact crater. Cropped, color variant.

Edited Mars Reconnaissance Orbiter image of a large-looking, dark sand dune sitting on top of relatively sand-free-looking terrain on Mars.

Edited Mars Reconnaissance Orbiter</b image of barchan dunes in the Martian north polar erg extending to the south.

Edited Mars Reconnaissance Orbiter image of a crater near Dorsa Argenta with lots of dark blotches.

Edited Mars Reconnaissance Orbiter image of a recent impact crater. Color variant.

Edited Mars Reconnaissance Orbiter image of irregular features in Nereidum Montes.

Edited Mars Reconnaissance Orbiter image of Gale Crater with Curiosity visible within the image. The region of the original image where Curiosity is visible with annotation to show where she is..

This subimage, about 400 meters across, shows the Mars Exploration Rover Opportunity (circled at lower left). The image was taken during the afternoon of Opportunity's 1783rd sol (Mars day) on the Red Planet. Opportunity had driven 130 m on the previous sol; wheel tracks are visible crossing dark ripples to the upper right of the rover. The ripples, which trend mostly north-south in this area, can be easily crossed by the rover unless they are very large (such as those right of center). The availability of HiRISE images of the terrain that Opportunity is crossing allow traverses to be planned in detail, avoiding potential hazards and targeting features of interest (such as the small craters below and left of center). HiRISE images are routinely used by the Opportunity operations team for these purposes, and to plan the route to distant Endeavour Crater, the longterm goal of Opportunity's mission, about 17 km to the southeast.

This image from the Mars Reconnaissance Orbiter shows a dark zone that could have been produced by multiple impacts in one location. In this example, the multiple impacts form an irregular patch, where dark material has been excavated, and is being redistributed by local winds. The darker, perhaps volcanic, material on Mars is often covered by brighter dust that settles out of the atmosphere. The darker wind streaks demonstrate the effectiveness of winds on Mars. ASU-IPF-3018

Edited Mars Reconnaissance Orbiter image of ridges in Thaumasia Planum.

Edited Mars Reconnaissance Orbiter image of landforms on Mars. (I forgot to copy the title of the image so I don't really know what the subject of this image was...). Lurid variant.

Edited Mars Reconnaissance Orbiter image of sand dunes in Nili Patera on Mars. Color/processing variant.

Acquired on April 1, 2018, this image from NASA’s Mars Reconnaissance Orbiter shows Aram Chaos, a 280 kilometer-diameter ancient impact crater that lies within the Southern Highlands of Mars. Uplifted blocks of light-toned layers, composed largely of the ironoxide hematite and water-altered silicates, indicate that this crater once held a lake.

Edited Mars Reconnaissance Orbiter image of a recent (as in sometime in the last ten years) crater with a dark slope streak headed away from it, caused after the strike. An older avalanche can be seen to the left of the slope streak.

Edited Mars Reconnaissance Orbiter image of "pristine" dust deposits ("pristine" as "untouched," not "clean" or my desk would be considered "pristine") in Syria Planum on Mars. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of a large crack in the ground east of Olympus Mons.

Edited Mars Reconnaissance Orbiter image of a mound in Solis Planum on Mars. Color/processing variant.