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The small, dark sand dunes at the bottom of this image captured by NASA's 2001 Mars Odyssey spacecraft are located on the floor of Escalante Crater.
The small, dark sand dunes at the bottom of this image captured by NASA's 2001 Mars Odyssey spacecraft are located on the floor of Escalante Crater.

Escalante Dunes

This image from NASA's 2001 Mars Odyssey spacecraft shows small sets of dunes on the plains of Aonia Terra.
This image from NASA's 2001 Mars Odyssey spacecraft shows small sets of dunes on the plains of Aonia Terra.

Dunes

This image captured by NASA's 2001 Mars Odyssey spacecraft shows more of the weathering of the eastern side of Mt. Sharp.
This image captured by NASA's 2001 Mars Odyssey spacecraft shows more of the weathering of the eastern side of Mt. Sharp.

Images of Gale #10

NASA's Mars Reconnaissance Orbiter's HiRISE, with its high resolution and eight years in orbit about Mars, has shown that many dunes and ripples on the planet are active.
NASA's Mars Reconnaissance Orbiter's HiRISE, with its high resolution and eight years in orbit about Mars, has shown that many dunes and ripples on the planet are active.

Hardened Dunes in Arcadia Planitia

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

Ares Vallis

This image captured by NASA's 2001 Mars Odyssey spacecraft shows more north polar dunes.
This image captured by NASA's 2001 Mars Odyssey spacecraft shows more north polar dunes.

More Polar Dunes

This image from NASA's Mars Reconnaissance Orbiter captures light-toned ridges found in a large fracture located east of Holden Crater forming a curious box-like pattern.
This image from NASA's Mars Reconnaissance Orbiter captures light-toned ridges found in a large fracture located east of Holden Crater forming a curious box-like pattern.

Many Small Interesting Ridges in Erythraea Fossa

This image shows part of the sand sheet and dunes on the floor of Rabe Crater as seen by NASA's 2001 Mars Odyssey spacecraft.
This image shows part of the sand sheet and dunes on the floor of Rabe Crater as seen by NASA's 2001 Mars Odyssey spacecraft.

Rabe Crater Dunes

The complex channel and streamlined islands are part of Maja Valles as seen by NASA's 2001 Mars Odyssey spacecraft.
The complex channel and streamlined islands are part of Maja Valles as seen by NASA's 2001 Mars Odyssey spacecraft.

Maja Valles

The channels in this image captured by NASA's 2001 Mars Odyssey spacecraft were most likely created by lava flows from Alba Mons, located in the northern Tharsis region.
The channels in this image captured by NASA's 2001 Mars Odyssey spacecraft were most likely created by lava flows from Alba Mons, located in the northern Tharsis region.

Channels

More dunes are encountered surrounding the north polar cap by NASA's 2001 Mars Odyssey spacecraft.
More dunes are encountered surrounding the north polar cap by NASA's 2001 Mars Odyssey spacecraft.

More Polar Dunes

This artist's impression Mars' Gale Crater depicts a cross section through the mountain in the middle of the crater, from a viewpoint looking toward the southeast. NASA's rover Curiosity will land in Gale Crater in August 2012.
This artist's impression Mars' Gale Crater depicts a cross section through the mountain in the middle of the crater, from a viewpoint looking toward the southeast. NASA's rover Curiosity will land in Gale Crater in August 2012.

Cross Section of Gale Crater, Mars

This image, acquired by NASA's Mars Reconnaissance Orbiter, shows there are a few more fans on the ridge as spring activity progresses in Inca City.
This image, acquired by NASA's Mars Reconnaissance Orbiter, shows there are a few more fans on the ridge as spring activity progresses in Inca City.

Spring in Inca City III

This stereo 3D scene from the Pancam on NASA's Mars Exploration Rover Opportunity looks back toward part of the west rim of Endeavour Crater that the rover drove along, heading southward, during the summer of 2014.
This stereo 3D scene from the Pancam on NASA's Mars Exploration Rover Opportunity looks back toward part of the west rim of Endeavour Crater that the rover drove along, heading southward, during the summer of 2014.

Rover's Tracks in Stereo View Along Rim of Endeavour Crater

This set of images illustrates how the science filters of the Mast Camera (Mastcam) on NASA's Mars rover Curiosity can be used to investigate aspects of the composition and mineralogy of materials on Mars.
This set of images illustrates how the science filters of the Mast Camera (Mastcam) on NASA's Mars rover Curiosity can be used to investigate aspects of the composition and mineralogy of materials on Mars.

Drill Hole Image and Spectra Acquired by Mastcam

The unnamed channel in this image captured by NASA's 2001 Mars Odyssey spacecraft is located on the northeastern margin of Tempe Terra.
The unnamed channel in this image captured by NASA's 2001 Mars Odyssey spacecraft is located on the northeastern margin of Tempe Terra.

Tempe Terra

Just as on Earth, volcanism and tectonism are found together on Mars. In this image from NASA's 2001 Mars Odyssey spacecraft the ridges and fractures of Claritas Fossae are affecting or perhaps hosting the volcanic flows of Solis Planum.
Just as on Earth, volcanism and tectonism are found together on Mars. In this image from NASA's 2001 Mars Odyssey spacecraft the ridges and fractures of Claritas Fossae are affecting or perhaps hosting the volcanic flows of Solis Planum.

Volcanism & Tectonism

NASA's Mars Reconnaissance Orbiter reveals underground ice exposed by impact cratering. The impact that dug the crater excavated water ice from beneath the surface.
NASA's Mars Reconnaissance Orbiter reveals underground ice exposed by impact cratering. The impact that dug the crater excavated water ice from beneath the surface.

Underground Ice on Mars Exposed by Impact Cratering

This image from NASA's Mars Reconnaissance Orbiter shows Morava Valles, a small outflow channel in the Margaritifer Sinus region of Mars.
This image from NASA's Mars Reconnaissance Orbiter shows Morava Valles, a small outflow channel in the Margaritifer Sinus region of Mars.

Seeing Beneath the Surface in Morava Valles

This image depicts how a mountain inside a Mars' Gale Crater might have formed. At left, the crater fills with layers of sediment. Yellow is for deposits in alluvial fans, deltas, and drifts during both wet and dry periods.
This image depicts how a mountain inside a Mars' Gale Crater might have formed. At left, the crater fills with layers of sediment. Yellow is for deposits in alluvial fans, deltas, and drifts during both wet and dry periods.

Sedimentation and Erosion in Gale Crater, Mars

On March 25, 2014, view from the Mastcam on NASA's Curiosity Mars rover looks southward at the Kimberley waypoint. Multiple sandstone beds show systematic inclination to the south suggesting progressive build-out of delta sediments.
On March 25, 2014, view from the Mastcam on NASA's Curiosity Mars rover looks southward at the Kimberley waypoint. Multiple sandstone beds show systematic inclination to the south suggesting progressive build-out of delta sediments.

Bedding Pattern Interpreted as Martian Delta Deposition

A surprise landslump in Melas Chasma was observed by NASA's Mars Reconnaissance Orbiter.
A surprise landslump in Melas Chasma was observed by NASA's Mars Reconnaissance Orbiter.

A Surprise Landslump in Melas Chasma

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

Rim Channels

This image from NASA's Mars Odyssey spacecraft shows Gale crater, which is east of the landing site. It shows the northern extent of the dunes, and the layers in Mt. Sharp are visible at the bottom of the image.
This image from NASA's Mars Odyssey spacecraft shows Gale crater, which is east of the landing site. It shows the northern extent of the dunes, and the layers in Mt. Sharp are visible at the bottom of the image.

Images of Gale #3

Channels are a common feature on the margin of Terra Cimmeria where the elevation changes from highland to northern lowlands in this image captured by NASA's Mars Odyssey.
Channels are a common feature on the margin of Terra Cimmeria where the elevation changes from highland to northern lowlands in this image captured by NASA's Mars Odyssey.

Channels on Terra Cimmeria

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