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This image from NASA's 2001 Mars Odyssey spacecraft shows a clear boundary between material being eroded by the wind (bottom of image) and a surface scoured clean (top of frame) northwest of Apollinaris Mons.
This image from NASA's 2001 Mars Odyssey spacecraft shows a clear boundary between material being eroded by the wind (bottom of image) and a surface scoured clean (top of frame) northwest of Apollinaris Mons.

Boundaries

Today's image from NASA's 2001 Mars Odyssey spacecraft shows a small portion of Daedalia Planum, which is comprised of lava flows from Arsia Mons. Note the small channel in the image. This channel was likely created by lava rather than water flow.
Today's image from NASA's 2001 Mars Odyssey spacecraft shows a small portion of Daedalia Planum, which is comprised of lava flows from Arsia Mons. Note the small channel in the image. This channel was likely created by lava rather than water flow.

Daedalia Planum

This image from NASA's Mars Reconnaissance Orbiter shows a graben (a trough formed when the ground drops between two parallel faults) and a lava flow in the Tharsis volcanic province of Mars. North is up.
This image from NASA's Mars Reconnaissance Orbiter shows a graben (a trough formed when the ground drops between two parallel faults) and a lava flow in the Tharsis volcanic province of Mars. North is up.

Graben Cutting Lava Flow in Tharsis

This image captured by NASA's 2001 Mars Odyssey shows a portion of the northeastern flank of Ascraeus Mons.
This image captured by NASA's 2001 Mars Odyssey shows a portion of the northeastern flank of Ascraeus Mons.

Ascraeus Mons

The amount of sand in this region of Juventae Chasma has coalesced into a sand sheet, rather than individual dune forms. Wind continues to sculpt the sand around high standing hills in this image from NASA's Mars Odyssey.
The amount of sand in this region of Juventae Chasma has coalesced into a sand sheet, rather than individual dune forms. Wind continues to sculpt the sand around high standing hills in this image from NASA's Mars Odyssey.

Juventae Chasma

This image captured by NASA's 2001 Mars Odyssey spacecraft is located southwest of Olympus Mons, shows the end of a lava flow that has flowed between the hills at the upper left portion of the image.
This image captured by NASA's 2001 Mars Odyssey spacecraft is located southwest of Olympus Mons, shows the end of a lava flow that has flowed between the hills at the upper left portion of the image.

Lava End

This view of the lower front and underbelly areas of NASA's Mars rover Curiosity was taken by the rover's MAHLI camera during Sept. 9, 2012. Also visible are the hazard avoidance cameras on the front of the rover.
This view of the lower front and underbelly areas of NASA's Mars rover Curiosity was taken by the rover's MAHLI camera during Sept. 9, 2012. Also visible are the hazard avoidance cameras on the front of the rover.

Belly Check for Curiosity

This image captured by NASA's 2001 Mars Odyssey spacecraft shows a portion of Labou Vallis.
This image captured by NASA's 2001 Mars Odyssey spacecraft shows a portion of Labou Vallis.

Labou Vallis

This image captured by NASA's 2001 Mars Odyssey spacecraft shows layering in the plains that comprise Utopia Planitia.
This image captured by NASA's 2001 Mars Odyssey spacecraft shows layering in the plains that comprise Utopia Planitia.

Plains Layers

Moving further east, we see more dunes. This image captured by NASA's 2001 Mars Odyssey spacecraft shows more of the crater rim and the crater floor seen in the image is not as smooth as in other parts of the crater.
Moving further east, we see more dunes. This image captured by NASA's 2001 Mars Odyssey spacecraft shows more of the crater rim and the crater floor seen in the image is not as smooth as in other parts of the crater.

Images of Gale #7

This image from NASA's Mars Odyssey spacecraft shows the northern part of Mt. Sharp and the crater floor between Mt. Sharp and the northern rim of Gale Crater. The layering of Mt. Sharp is visible at the bottom of the image.
This image from NASA's Mars Odyssey spacecraft shows the northern part of Mt. Sharp and the crater floor between Mt. Sharp and the northern rim of Gale Crater. The layering of Mt. Sharp is visible at the bottom of the image.

Images of Gale #4

Dark slope steaks mark the ridges of this region in Lycus Sulci in this image from NASA's 2001 Mars Odyssey spacecraft.
Dark slope steaks mark the ridges of this region in Lycus Sulci in this image from NASA's 2001 Mars Odyssey spacecraft.

Lycus Sulci

This is a version of one of the first images taken by a front Hazard-Avoidance camera on NASA's Curiosity rover. It was taken through a
This is a version of one of the first images taken by a front Hazard-Avoidance camera on NASA's Curiosity rover. It was taken through a

Curiosity's Front View, Linearized

The two depression crossing this image are called Pavonis Fossae and are located just north of the volcano in this image captured by NASA's 2001 Mars Odyssey spacecraft.
The two depression crossing this image are called Pavonis Fossae and are located just north of the volcano in this image captured by NASA's 2001 Mars Odyssey spacecraft.

Pavonis Fossae

Thick stacks of clay minerals indicate chemical alteration of thick stacks of rock by interaction with liquid water on ancient Mars as seen in this image from NASA's Mars Reconnaissance Orbiter.
Thick stacks of clay minerals indicate chemical alteration of thick stacks of rock by interaction with liquid water on ancient Mars as seen in this image from NASA's Mars Reconnaissance Orbiter.

Chemical Alteration by Water, Mawrth Vallis

Dark slope streaks are visible in this image of Amazonis Planitia captured by NASA's 2001 Mars Odyssey spacecraft.
Dark slope streaks are visible in this image of Amazonis Planitia captured by NASA's 2001 Mars Odyssey spacecraft.

Dark Slope Streaks

The dunes in this image captured by NASA's Mars Odyssey are located on the floor of Kaiser Crater.
The dunes in this image captured by NASA's Mars Odyssey are located on the floor of Kaiser Crater.

Kaiser Crater Dunes

This image from NASA's Mars Odyssey shows dark slope streaks, a common feature on the rim of this unnamed crater within Tikhonravov Crater.
This image from NASA's Mars Odyssey shows dark slope streaks, a common feature on the rim of this unnamed crater within Tikhonravov Crater.

Dark Slope Streaks within Tikhonravov Crater

NASA's Mars Exploration Rover Opportunity used the wire brush of its rock abrasion tool to scour dust from a circular target area on a rock called 'Marquette Island.'
NASA's Mars Exploration Rover Opportunity used the wire brush of its rock abrasion tool to scour dust from a circular target area on a rock called 'Marquette Island.'

Examining 'Marquette Island'

The windstreak in this image from NASA's 2001 Mars Odyssey spacecraft is located on Tharsis volcanic lava flows east of Olympus Mons.
The windstreak in this image from NASA's 2001 Mars Odyssey spacecraft is located on Tharsis volcanic lava flows east of Olympus Mons.

Windstreak

The unusual and apparently layered surface in this image from NASA's 2001 Mars Odyssey spacecraft is located in Aureum Chaos.
The unusual and apparently layered surface in this image from NASA's 2001 Mars Odyssey spacecraft is located in Aureum Chaos.

Aureum Chaos

Small channels dissect the inner rim of this unnamed crater in Arabia Terra as seen by NASA's 2001 Mars Odyssey spacecraft.
Small channels dissect the inner rim of this unnamed crater in Arabia Terra as seen by NASA's 2001 Mars Odyssey spacecraft.

Channels

This image captured by NASA's 2001 Mars Odyssey spacecraft shows the complexity of wind erosion on Mars. The erosion of the hills and the gouge-like pits indicate two, if not three wind directions that all altered the surface.
This image captured by NASA's 2001 Mars Odyssey spacecraft shows the complexity of wind erosion on Mars. The erosion of the hills and the gouge-like pits indicate two, if not three wind directions that all altered the surface.

Wind Erosion

Craters are most often the site of gully formation on Mars. Mega-gullies are also found on the southwestern parts of Vallis Marineris, and in this image from NASA's 2001 Mars Odyssey spacecraft, on hills east of Argyre Planitia.
Craters are most often the site of gully formation on Mars. Mega-gullies are also found on the southwestern parts of Vallis Marineris, and in this image from NASA's 2001 Mars Odyssey spacecraft, on hills east of Argyre Planitia.

Gullies

This image taken by NASA's Mars Reconnaissance Orbiter covers part of a candidate landing site that appears to be a shallow depression with a deposit perhaps consisting of chlorides, like table salt.
This image taken by NASA's Mars Reconnaissance Orbiter covers part of a candidate landing site that appears to be a shallow depression with a deposit perhaps consisting of chlorides, like table salt.

Candidate Landing Site in Possible Salt Playa

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