Edited Mars Reconnaissance Orbiter image of polygonal patterns of frost and cracks in carbon dioxide ice on Mars.

Edited Mars Reconnaissance Orbiter image of carbon dioxide erosion (I suspect it's erosion by carbon dioxide, not of carbon dioxide...)

Both ancient and modern deposits within craters in the northern lowlands area of Nilosyrtis are visible in this HiRISE observation. This crater and its neighbors are partially filled with sediments that display unusual morphologies, having patterned interiors and radial filaments. The crater centers are occupied by heavily eroded mounds of material that probably once buried the craters in this region. Horizontal layering is visible in similar mounds elsewhere in this image, and close inspection shows that these mounds are covered by rocks, presumably ejecta from distant impacts. The accumulation of ejecta on their surfaces indicates that the mounds are not recent deposits of dust or sand, but rather are ancient sediments perhaps deposited in a primordial sea. The radial filaments are much more recent deposits, as shown by the lack of ejecta on their surfaces, and are likely made up of dust and sand that is trapped between the older mounds and the crater walls.

Edited Mars Reconnaissance Orbiter image of a circular structure in a (probably lava) channel on Mars.

Edited Mars Reconnaissance Orbiter image of the entrance to Mawrth Vallis. Red channel version.

Edited Mars Reconnaissance Orbiter image of the monitoring of the slopes of Palikir Crater. Color variant.

Edited Mars Reconnaissance Orbiter image of dark sand/powder/ejecta from two craters on Mars.

Edited Mars Reconnaissance Orbiter image of gullies being monitored for changes.

Edited Mars Reconnaissance Orbiter image of a depression or crater on Mars with a very cracked crust near by. Processing variant.

Edited Mars Reconnaissance Orbiter PR image of a relatively recent crater on Mars. Context image.

This image shows detail of a small volcanic complex in the region of Mars called Tharsis. Tharsis, a high volcanic region thousands of kilometers wide, hosts some of the largest known volcanos in the Solar System. The volcanic crater seen here, however, is only about 1 kilometer (0.6 miles) across. This means that Tharsis was covered with volcanic activity at a wide range of scales. The wavy ridges of material seen here are solidified lava flows.

Edited Mars Reconnaissance Orbiter image of a pit south of Arsia Mons. Cropped variant.

Edited Mars Reconnaissance Orbiter image of Curiosity in Gale Crater. This is an enlarged part of a much larger image (see following images) that shows Curiosity and some of her tracks in the sand. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of a round(ish) depression, looking a bit like a cat's eye, in a field of large boulders on Mars.

Edited Mars Reconnaissance Orbiter image of a central uplift and sand dunes in a crater in the Hesperia region of Mars.

Edited Mars Reconnaissance Orbiter image of Curiosity next to Namib Dune in Gale Crater. Color variant.

Details such as the shadow of the mast on NASA's Mars rover Curiosity appear in an image taken Aug. 17, 2012, by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter, from more directly overhead than previous HiRISE images of Curiosity.

In this product, cutouts showing the rover and other hardware or ground markings from the landing of the Mars Science Laboratory spacecraft are presented across the top of a larger, quarter-resolution overview keyed to the full-resolution cutouts. North is up. The scale bar is 200 meters (one-eighth of a mile).

Curiosity landed Aug. 5, PDT (Aug. 6, EDT). HiRISE imaged the spacecraft during its descent, on the first day after landing and on the sixth day after landing. This image was acquired looking more directly down (9 degree roll angle) than the prior images so the pixel scale is improved to approximately 11 inches (27 centimeters) per pixel. Each cutout is individually stretched to best show the information without saturation. A special noise cleaning method was applied to the images by Paul Geissler of U.S. Geological Survey.

The shadow of Curiosity's mast extends southeast from the rover, opposite the solar illumination direction.

Edited Mars Reconnaissance Orbiter image of a candidate landing site for Mars 2020 in Oyama Crater.

Edited Mars Reconnaissance Orbiter image of gullies on a mountain side in Hale Crater on Mars. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of a candidate landing site in Oyama Crater for the Mars 2020 rover mission.

This oblique image from NASA's Mars Reconnaissance Orbiter, of part of the North Polar layered deposits, acquired in the summertime, shows both phenomena in the upper and lower panel, plus a topographic bend in the middle panel. Blue areas in this enhanced color image are covered by frost, whereas the darker colors are from differences in contamination and texture of the icy layers.

In geology, an unconformity is a buried erosion surface, where the bedding layers don't match. It doesn't mean a mismatch in attitudes and beliefs, with rebellious behavior like streaking. But Mars does have streaking of a different kind, from the wind.

Edited Mars Reconnaissance Orbiter image of a possible ExoMars landing site in Aram Dorsum.

Edited Mars Reconnaissance Orbiter image of sand dunes on Mars. The shadows trick you into thinking these are holes but they're not...

Edited Mars Reconnaissance Orbiter image of a crater north of Hellas Planitia (a massively huge impact basin) with possible phyllosilicates in its ejecta. Color variant.

Edited Mars Reconnaissance Orbiter image of sand dunes and slopes.

Edited Mars Reconnaissance Orbiter image of a crater with terraces.

Edited Mars Reconnaissance Orbiter image of Mar's residual south pole ice (carbon dioxide ice) cap. Color variant.

Edited Mars Reconnaissance Orbiter image of two craters in Saheki Crater on Mars. These two craters were most likely formed at the same time from an asteroid that split into two before smacking into Mars.

MRO image of brachan dunes on Mars. It looks as if the mesas to the left are dripping the sand dunes...

Edited Mars Reconnaissance Orbiter image of Shalbatana Valles on Mars. Color/processing variant.

Image source: photojournal.jpl.nasa.gov/catalog/PIA22182

Original caption: Layers, probably sedimentary in origin, have undergone extensive erosion in this image from NASA's Mars Reconnaissance Orbiter (MRO) of Shalbatana Valles, a prominent channel that cuts through Xanthe Terra.

This erosion has produced several small mesas and exposed light-toned material that may differ in composition from the surrounding material.

The map is projected here at a scale of 25 centimeters (9.8 inches) per pixel. [The original image scale is 27.5 centimeters (10.8 inches) per pixel (with 1 x 1 binning); objects on the order of 82 centimeters (32.3 inches) across are resolved.] North is up.

The University of Arizona, Tucson, operates HiRISE, which was built by Ball Aerospace & Technologies Corp., Boulder, Colorado. NASA's Jet Propulsion Laboratory, a division of Caltech in Pasadena, California, manages the Mars Reconnaissance Orbiter Project for NASA's Science Mission Directorate, Washington.

Image Credit:

NASA/JPL-Caltech/Univ. of Arizona

Image Addition Date:

2018-01-23

Edited Mars Reconnaissance Orbiter image of part of Syria Planum showing dark colors and crater. Color/processing variant.

Edited Mars Reconnaissance Orbiter image of Aram Chaos slopes. Processing variant.

Edited Mars Reconnaissance Orbiter image of a bluish ("purple" according to the MRO headline) mountain on Mars. Color variant.

Edited Mars Reconnaissance Orbiter image of new craters on a light-colored background on Mars.

Edited Mars Reconnaissance Orbiter image of gullies on a mountain side in Hale Crater on Mars.

Edited Mars Reconnaissance Orbiter image of a scarp in the mid-latitude mantle.

Edited Mars Reconnaissance Orbiter image of the monitoring of (but no mention of what) Nili Patera.

Edited Mars Reconnaissance Orbiter PR image of part of a circular landform north of Kasei Valley.

Edited Mars Reconnaissance Orbiter image of hills near Grjota Valles. Color variant.

Edited Mars Reconnaissance Orbiter image of low strata exposing clay minerals. Along with what looks like a volcano.

Edited Mars Reconnaissance Orbiter image of gullies in a nameless crater in Utopia Planitia. Color variant.

Edited Mars Reconnaissance Orbiter image of the monitoring of the slopes of Palikir Crater.

This image shows the geologic contact between the walls of Ganges Chasma and the adjacent plains. Ganges Chasma is one of several deep troughs that make up the Valles Marineris system on Mars. The upper slopes of the walls of Ganges have layering that appears dark, rough, and blocky, consistent with lava flows that are thought to make up the plains around Valles Marineris. Outside of Ganges on the plains is an unusual deposit that appears bright and is eroding back from the walls of Ganges, indicating the deposit isn

Even with the sun high in the sky, this collapse pit on a Martian lava plain is so deep that even the super-sensitive Mars Reconnaissance Orbiter cannot see the bottom. On Earth, openings like this one often lead to extensive cave networks, and on Mars, such a place could shelter life, or even future astronauts.

Sent by: Mars Reconnaissance Orbiter | From: Mars | Sent: Oct, 2008 | Credit: NASA/JPL/UA

Added to www.ridingwithrobots.org Oct 31, 2008.

Edited Mars Reconnaissance Orbiter image of an inverted river bed in Gale Crater. Color/processing variant.

Kaleidoscopic version of a Mars Reconnaissance Orbiter image of, as you'd expect, Mars.

Edited Mars Reconnaissance Orbiter image of landforms in Tyrrhena Terra.

Edited Mars Reconnaissance Orbiter image of either A) the Triple Crater, or B) a triple crater. The blurb at the NASA website was rather brief... Color variant.

Edited Mars Reconnaissance Orbiter image of USGS sand dunes (database entry 0081-097) being monitored for changes. Color variant.

Edited Mars Reconnaissance Orbiter image of a candidate landing site in Mawrth Vallis for ESA's ExoMars.