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This image captured by NASA's 2001 Mars Odyssey spacecraft shows part of a depression (or trough) on the polar cap.
This image captured by NASA's 2001 Mars Odyssey spacecraft shows part of a depression (or trough) on the polar cap.

South Polar Cap

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.
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.

Martian Morse Code

The THEMIS camera contains 5 filters. The data from different filters can be combined in multiple ways to create a false color image. This image from NASA's 2001 Mars Odyssey spacecraft shows part of the plains of Terra Sirenum.
The THEMIS camera contains 5 filters. The data from different filters can be combined in multiple ways to create a false color image. This image from NASA's 2001 Mars Odyssey spacecraft shows part of the plains of Terra Sirenum.

Terra Sirenum - False Color

This image from NASA's 2001 Mars Odyssey spacecraft shows a very small portion of Kasei Valles. There are several streamlined islands near the center of the image.
This image from NASA's 2001 Mars Odyssey spacecraft shows a very small portion of Kasei Valles. There are several streamlined islands near the center of the image.

Kasei Valles

The Eridania Basin is thought to have once contained a large sea. This image from NASA's Mars Reconnaissance Orbiter spacecraft shows the Gorgonum Basin, which lies along the eastern edge of Eridania.
The Eridania Basin is thought to have once contained a large sea. This image from NASA's Mars Reconnaissance Orbiter spacecraft shows the Gorgonum Basin, which lies along the eastern edge of Eridania.

Inverted Terrain in Eridania

This image captured by NASA's 2001 Mars Odyssey spacecraft shows a portion of one of the larger depressions on the NW edge of the Elysium volcanic complex.
This image captured by NASA's 2001 Mars Odyssey spacecraft shows a portion of one of the larger depressions on the NW edge of the Elysium volcanic complex.

Elysium Fossae

The THEMIS VIS camera contains 5 filters. Data from different filters can be combined in many ways to create a false color image. The linear features in this image from NASA's 2001 Mars Odyssey spacecraft are the graben called Sirenum Fossae.
The THEMIS VIS camera contains 5 filters. Data from different filters can be combined in many ways to create a false color image. The linear features in this image from NASA's 2001 Mars Odyssey spacecraft are the graben called Sirenum Fossae.

Sirenum Fossae - False Color

The linear wall at the bottom of this image from NASA's 2001 Mars Odyssey spacecraft is a fault. The linear depression caused by faulting is part of a long depression called Mangala Fossae.
The linear wall at the bottom of this image from NASA's 2001 Mars Odyssey spacecraft is a fault. The linear depression caused by faulting is part of a long depression called Mangala Fossae.

Mangala Fossae

There are some interesting erosional signs in this observation from NASA's Mars Reconnaissance Orbiter, which will make for a good comparison with other intracrater fans and fluvial sedimentary landforms.
There are some interesting erosional signs in this observation from NASA's Mars Reconnaissance Orbiter, which will make for a good comparison with other intracrater fans and fluvial sedimentary landforms.

Sinuous Ridge Materials in Reuyl Crater

Osuga Valles lies around 170 kilometers to the south of Eos Chasma, which is at the eastern end of the vast Valles Marineris canyon system as seen by NASA's Mars Reconnaissance Orbiter.
Osuga Valles lies around 170 kilometers to the south of Eos Chasma, which is at the eastern end of the vast Valles Marineris canyon system as seen by NASA's Mars Reconnaissance Orbiter.

The Lowest Point of Osuga Valles

In this observation, does the morphology of these possible sedimentary fans match those found in Mojave Crater (not picture here)?
In this observation, does the morphology of these possible sedimentary fans match those found in Mojave Crater (not picture here)?

Sedimentary Fans North of Mojave Crater

The 'Bonanza King' rock on Mars, pictured here, was tapped by the drill belonging to NASA's Mars rover Curiosity. The tapping resulted in sand piling up on the rock after drilling, showing the rock was not firmly in place.
The 'Bonanza King' rock on Mars, pictured here, was tapped by the drill belonging to NASA's Mars rover Curiosity. The tapping resulted in sand piling up on the rock after drilling, showing the rock was not firmly in place.

Loose Rock Leads to Incomplete Drilling

This March 20, 2014, image from the MARCI camera on NASA's Mars Reconnaissance Orbiter has a dark spot (at center of rectangle) noticed while the image was being examined for a weather report.
This March 20, 2014, image from the MARCI camera on NASA's Mars Reconnaissance Orbiter has a dark spot (at center of rectangle) noticed while the image was being examined for a weather report.

Impact Scar Detected in Mars Weathercam Image

Sand dunes like those seen in this image from NASA's Mars Reconnaissance Orbiter have been observed to creep slowly across the surface of Mars through the action of the wind.
Sand dunes like those seen in this image from NASA's Mars Reconnaissance Orbiter have been observed to creep slowly across the surface of Mars through the action of the wind.

Dunes on the Rim of the Hellas Impact Basin

The North Polar region of Mars is capped with layers of water ice and dust, called the 'polar layered deposits.' This permanent polar cap is covered in the winter with a layer of seasonal carbon dioxide ice as seen by NASA's Mars Reconnaissance Orbiter.
The North Polar region of Mars is capped with layers of water ice and dust, called the 'polar layered deposits.' This permanent polar cap is covered in the winter with a layer of seasonal carbon dioxide ice as seen by NASA's Mars Reconnaissance Orbiter.

Spring Slide

This image from NASA's Mars Odyssey spacecraft shows the major channel that started near the top of Mt. Sharp. Near the top of this image is a wide valley that reaches to the crater floor and the nearby dunes.
This image from NASA's Mars Odyssey spacecraft shows the major channel that started near the top of Mt. Sharp. Near the top of this image is a wide valley that reaches to the crater floor and the nearby dunes.

Images of Gale #18

The Dynamic Albedo of Neutrons (DAN) instrument on NASA's Mars rover Curiosity detects even very small amounts of water in the ground beneath the rover, primarily water bound into the crystal structure of hydrated minerals.
The Dynamic Albedo of Neutrons (DAN) instrument on NASA's Mars rover Curiosity detects even very small amounts of water in the ground beneath the rover, primarily water bound into the crystal structure of hydrated minerals.

Two Types of Modeling of Subsurface Water

This image captured by NASA's 2001 Mars Odyssey spacecraft shows volcanic flows from Arsia Mons, the southernmost of the Tharsis volcanoes.
This image captured by NASA's 2001 Mars Odyssey spacecraft shows volcanic flows from Arsia Mons, the southernmost of the Tharsis volcanoes.

Arsia Mons Flows

A large sand sheet with surface dune forms covers the floor of this unnamed northern crater, as shown in this image captured by NASA's 2001 Mars Odyssey spacecraft.
A large sand sheet with surface dune forms covers the floor of this unnamed northern crater, as shown in this image captured by NASA's 2001 Mars Odyssey spacecraft.

Crater Dunes

NASA's Mars Exploration Rover Opportunity used its navigation camera to record this view in the eastward driving direction after completing a drive on July 17, 2011, that took the rover's total driving distance on Mars beyond 20 miles.
NASA's Mars Exploration Rover Opportunity used its navigation camera to record this view in the eastward driving direction after completing a drive on July 17, 2011, that took the rover's total driving distance on Mars beyond 20 miles.

Drive Direction Image by Opportunity After Surpassing 20 Miles

The percussion drill in the turret of tools at the end of the robotic arm of NASA's Mars rover Curiosity has been positioned in contact with the rock surface in this image from the rover's front Hazard-Avoidance Camera (Hazcam).
The percussion drill in the turret of tools at the end of the robotic arm of NASA's Mars rover Curiosity has been positioned in contact with the rock surface in this image from the rover's front Hazard-Avoidance Camera (Hazcam).

Curiosity's Drill in Place for Load Testing Before Drilling

NASA's Mars Reconnaissance Orbiter observed a small portion of a dark crater floor in the Tyrrhena Terra region of Mars. This is largely ancient hard bedrock that has been cratered by numerous impacts over the eons.
NASA's Mars Reconnaissance Orbiter observed a small portion of a dark crater floor in the Tyrrhena Terra region of Mars. This is largely ancient hard bedrock that has been cratered by numerous impacts over the eons.

Hard Knocks in Tyrrhena Terra

NASA's Mars Reconnaissance Orbiter spies a layer of dry ice covering Mars' south polar layer. In the spring, gas created from heating of the dry ice escapes through ruptures in the overlying seasonal ice, entraining material from the ground below.
NASA's Mars Reconnaissance Orbiter spies a layer of dry ice covering Mars' south polar layer. In the spring, gas created from heating of the dry ice escapes through ruptures in the overlying seasonal ice, entraining material from the ground below.

How Gas Carves Channels

This image from NASA's Mars Reconnaissance Orbiter shows mounds of light-toned deposits within the central portion of Valles Marineris.
This image from NASA's Mars Reconnaissance Orbiter shows mounds of light-toned deposits within the central portion of Valles Marineris.

Deposits along the Northern Wall of Melas Chasma

This region of Xanthe Terra has mostly been contracted due to thrust faulting, but this local region shows evidence of extensional faulting, also called normal faulting. This observation is from NASA's Mars Reconnaissance Orbiter spacecraft.
This region of Xanthe Terra has mostly been contracted due to thrust faulting, but this local region shows evidence of extensional faulting, also called normal faulting. This observation is from NASA's Mars Reconnaissance Orbiter spacecraft.

Faulting Mars

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