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Add Image to Favorite List 2002-12-18 Mars 2001 Mars Odyssey
 THEMIS
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This image from NASA's Mars Odyssey shows the cratered highlands of Terra Cimmeria. The image contains several long troughs of Sirenum Fossae running primarily from left to right. These features are parallel to semi-parallel fractures called graben.
PIA04048:
Terra Cimmeria Highlands
Full Resolution:     TIFF (3.122 MB)     JPEG (496.1 kB)
Add Image to Favorite List 2002-12-18 Mars 2001 Mars Odyssey
 THEMIS
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This scene from NASA's Mars Odyssey spacecraft shows several interesting geologic features associated with impact craters on Mars.
PIA04049:
Impact Crater
Full Resolution:     TIFF (3.229 MB)     JPEG (638.3 kB)
Add Image to Favorite List 2002-12-19 Mars 2001 Mars Odyssey
 THEMIS
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Hills abound in this portion of Mars imaged by NASA's Mars Odyssey spacecraft and located in the Vastitas Borealis region of the high northern plains. These hills are part of Scandia Colles.
PIA04054:
Bumpy Terrain
Full Resolution:     TIFF (3.319 MB)     JPEG (783.5 kB)
Add Image to Favorite List 2002-12-19 Mars 2001 Mars Odyssey
 THEMIS
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This NASA Mars Odyssey image was taken during winter in the southern hemisphere, meaning that the usually cloudy Hellas Basin is relatively free from clouds.
PIA04055:
Winter in Hellas Basin
Full Resolution:     TIFF (3.628 MB)     JPEG (975.1 kB)
Add Image to Favorite List 2002-12-19 Mars 2001 Mars Odyssey
 THEMIS
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This image from NASA's Mars Odyssey covers a region in western Arabia Terra, which contains two interesting craters. The eastern floor of the largest crater seen in most of this image is bumpy and ridged in places and relatively smooth in regions.
PIA04056:
Western Arabia Terra
Full Resolution:     TIFF (3.34 MB)     JPEG (691.6 kB)
Add Image to Favorite List 2002-12-19 Mars 2001 Mars Odyssey
 THEMIS
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The Cydonia region on Mars, seen in this image from NASA's Mars Odyssey spacecraft, straddles the boundary between the bright, dusty, cratered highlands to the southeast and the dark, relatively dust-free, lowland plains to the west.
PIA04057:
Cydonia Landscape
Full Resolution:     TIFF (2.926 MB)     JPEG (540.3 kB)
Add Image to Favorite List 2002-12-19 Mars 2001 Mars Odyssey
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Located in Arabia Terra, the crater shown in this image from NASA's Mars Odyssey spacecraft is known as Henry Crater. Like many other craters on Mars, the interior of Henry Crater is filled with a layered deposit.
PIA04058:
Henry Crater
Full Resolution:     TIFF (3.171 MB)     JPEG (618.5 kB)
Add Image to Favorite List 2002-12-19 Mars 2001 Mars Odyssey
 THEMIS
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This NASA Mars Odyssey image of rounded hills and ridges in Arcadia Planitia shows a very intriguing geomorphic feature that may be attributed to the presence of an icy-rock mixture of material.
PIA04059:
Arcadia Planitia
Full Resolution:     TIFF (3.355 MB)     JPEG (652.3 kB)
Add Image to Favorite List 2002-12-19 Mars 2001 Mars Odyssey
 THEMIS
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This image from NASA's Mars Odyssey spacecraft shows the eastern portion of a region on Mars called Hesperia Planum. Immediately visible in the image is the dark barchan type dunes that are being blown against the southeast wall of the crater.
PIA04060:
Hesperia Planum
Full Resolution:     TIFF (2.982 MB)     JPEG (441.6 kB)
Add Image to Favorite List 2002-12-19 Mars 2001 Mars Odyssey
 THEMIS
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This NASA Mars Odyssey image shows parts of the dissected and eroded remnants of an impact crater rim and volcanic material located north of Apollinaris Patera near the southern highlands - northern lowlands dichotomy on Mars.
PIA04061:
Appollinaris Patera
Full Resolution:     TIFF (1.411 MB)     JPEG (244.3 kB)
Add Image to Favorite List 2002-12-19 Mars 2001 Mars Odyssey
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This image from NASA's Mars Odyssey shows deposits in a crater located in Arabia Terra. Arabia is generally dust covered and dark streaks or dust avalanches are present in the crater walls.
PIA04062:
Arabia Terra
Full Resolution:     TIFF (3.218 MB)     JPEG (493.8 kB)
Add Image to Favorite List 2002-12-19 Mars 2001 Mars Odyssey
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Like drippings from a candle, these lava flows on the flank of Olympus Mons volcano, seen in this image from NASA's Mars Odyssey spacecraft, demonstrate how it became the largest volcano in the solar system.
PIA04063:
Olympus Mons Flows
Full Resolution:     TIFF (3.498 MB)     JPEG (842.2 kB)
Add Image to Favorite List 2002-12-19 Mars 2001 Mars Odyssey
 THEMIS
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This image from NASA's Mars Odyssey is located near the equator and the prime meridian of Mars in a region called Terra Meridiani. This is a unique area of Mars that displays layers of material that appear to be in the process of being stripped away.
PIA04064:
Terra Meridiani
Full Resolution:     TIFF (3.228 MB)     JPEG (625.1 kB)
Add Image to Favorite List 2002-12-19 Mars 2001 Mars Odyssey
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This NASA Mars Odyssey image captures a portion of several lava flows in Daedalia Planum southwest of the Arsia Mons shield volcano. Textures characteristic of the variable surface roughness associated with different lava flows in this region are easily s
PIA04065:
Lava Flows of Daedalia Planum
Full Resolution:     TIFF (3.521 MB)     JPEG (855.6 kB)
Add Image to Favorite List 2002-12-19 Mars 2001 Mars Odyssey
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Reull Vallis, located in Mars' cratered southern hemisphere, flows for over 1,000 km (about 620 miles) toward the Hellas basin. This NASA Mars Odyssey image shows a portion of the channel with its enigmatic lineated floor deposits.
PIA04066:
Reull Vallis
Full Resolution:     TIFF (3.007 MB)     JPEG (543.8 kB)
Add Image to Favorite List 2002-12-20 Mars 2001 Mars Odyssey
 THEMIS
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This image from NASA's Mars Odyssey spacecraft shows fractures within the volcanic plains south of Elysium Mons.
PIA04067:
Cerberus Rupes
Full Resolution:     TIFF (3.187 MB)     JPEG (619.6 kB)
Add Image to Favorite List 2002-12-20 Mars 2001 Mars Odyssey
 THEMIS
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Coprates Chasma comprises the central portion of the Valles Marineris canyon system complex. This image from NASA's Mars Odyssey spacecraft of the southern wall of Coprates Chasma contains a landslide deposit with dunes over portions of slide.
PIA04068:
Coprates Chasma Landslide
Full Resolution:     TIFF (2.927 MB)     JPEG (436.8 kB)
Add Image to Favorite List 2002-12-20 Mars 2001 Mars Odyssey
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This image from NASA's Mars Odyssey shows part of the summit caldera of Pavonis Mons, the middle of three Tharsis volcanos that form a line southeast of Olympus Mons and northwest of Vallis Marineris.
PIA04069:
Pavonis Mons Summit Caldera
Full Resolution:     TIFF (3.344 MB)     JPEG (601.9 kB)
Add Image to Favorite List 2002-12-20 Mars 2001 Mars Odyssey
 THEMIS
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The style of erosion along the highlands-lowlands boundary of southern Elysium Planitia has produced a strange pattern of troughs that look like the skin of a reptile, as seen in this image from NASA's Mars Odyssey spacecraft.
PIA04070:
Scaly-skinned Mars
Full Resolution:     TIFF (3.419 MB)     JPEG (795.2 kB)
Add Image to Favorite List 2002-12-20 Mars 2001 Mars Odyssey
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A large streamlined island in Kasei Vallis, as seen in this NASA Mars Odyssey image, shows evidence of scour on its surface, probably from floods that preceded the formation of the island.
PIA04071:
Kasei Vallisland
Full Resolution:     TIFF (2.656 MB)     JPEG (357.1 kB)
Add Image to Favorite List 2002-12-20 Mars 2001 Mars Odyssey
 THEMIS
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Ripple bedforms fill large fractures near the southern rim of Holden Crater in this image from NASA's Mars Odyssey spacecraft.
PIA04072:
Holden Crater
Full Resolution:     TIFF (2.797 MB)     JPEG (427.2 kB)
Add Image to Favorite List 2002-12-20 Mars 2001 Mars Odyssey
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Dark streaks emanating from within impact crater walls show evidence for mass movement of materials in this image from NASA's Mars Odyssey spacecraft.
PIA04073:
Impact crater
Full Resolution:     TIFF (3.065 MB)     JPEG (526.7 kB)
Add Image to Favorite List 2002-12-20 Mars 2001 Mars Odyssey
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These pit-chain features in this NASA Mars Odyssey image of south Noctis Labryinthus are oriented parallel to grabens in the area, suggesting that tensional stresses may have been responsible for their formation.
PIA04074:
Pit-chain in Noctis Labyrinthus
Full Resolution:     TIFF (2.266 MB)     JPEG (272.3 kB)
Add Image to Favorite List 2002-12-20 Mars 2001 Mars Odyssey
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In this image from NASA's Mars Odyssey spacecraft, bizarre textures cover the surface of eastern Utopia Planitia, where there is a high probability that ground ice has played a role in the formation of this unusual landscape.
PIA04075:
Textures in Utopia Planitia
Full Resolution:     TIFF (3.3 MB)     JPEG (901.4 kB)
Add Image to Favorite List 2002-12-20 Mars 2001 Mars Odyssey
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Impact craters in Hecates Tholus, as seen in this image from NASA's Mars Odyssey spacecraft, appear to be filled with sediment derived from erosion of the surrounding terrain.
PIA04076:
Hecates Tholus
Full Resolution:     TIFF (1.571 MB)     JPEG (311.2 kB)
Add Image to Favorite List 2002-12-20 Mars 2001 Mars Odyssey
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Streamlined channels near Lucus Planum can be seen in this image from NASA's Mars Odyssey spacecraft. These features were formed by catastrophic floods in the Martian past.
PIA04077:
Channels near Lucus Planum
Full Resolution:     TIFF (3.353 MB)     JPEG (578.5 kB)
Add Image to Favorite List 2003-01-24 Mars 2001 Mars Odyssey
 THEMIS
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This pair of infrared images from NASA's Mars Odyssey spacecraft shows the so-called 'face on Mars' landform viewed during both the day and night.
PIA04100:
The So-called "Face on Mars" at Night
Full Resolution:     TIFF (454 kB)     JPEG (97.73 kB)
Add Image to Favorite List 2003-01-09 Mars 2001 Mars Odyssey
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Islands of older high-standing terrain rise above a sea of relatively young, platy lava flows between two of the largest volcanoes in the solar system in this image from NASA's Mars Odyssey spacecraft.
PIA04078:
A Sea of Lava
Full Resolution:     TIFF (3.327 MB)     JPEG (764.3 kB)
Add Image to Favorite List 2003-01-09 Mars 2001 Mars Odyssey
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This image from NASA's Mars Odyssey spacecraft shows fractures within the volcanic plains south of Elysium Mons.
PIA04079:
Cerberus Rupes
Full Resolution:     TIFF (3.187 MB)     JPEG (619.5 kB)
Add Image to Favorite List 2003-01-09 Mars 2001 Mars Odyssey
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This area of Mars imaged by NASA's Mars Odyssey shows a wonderful example of relative geologic dating. Ancient lava flows and escarpments are mantled by younger impact ejecta, which was cut by a younger graben and resurfaced by smaller impact craters.
PIA04080:
Resurfaced Mars
Full Resolution:     TIFF (2.852 MB)     JPEG (461.8 kB)
Add Image to Favorite List 2003-01-09 Mars 2001 Mars Odyssey
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A variegated mottled texture located NW of the volcano Elysium Monsis is readily apparent in the terrain imaged here by NASA's Mars Odyssey spacecraft. The Hrad Vallis channel system can be seen sauntering across the bumpy landscape of Utopia Planitia.
PIA04081:
Complex and Perplexing Mars
Full Resolution:     TIFF (3.519 MB)     JPEG (847.8 kB)
Add Image to Favorite List 2003-01-09 Mars 2001 Mars Odyssey
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In this image from NASA's Mars Odyssey, a mantling layer of sediment slumps off the edge of a mesa in Candor Chasma producing a ragged pattern of erosion that hints at the presence of a volatile component mixed in with the sediment.
PIA04082:
Candor Chasma Mesa
Full Resolution:     TIFF (3.453 MB)     JPEG (689.4 kB)
Add Image to Favorite List 2003-01-09 Mars 2001 Mars Odyssey
 THEMIS
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Erosion of the interior layered deposits of Melas Chasma, part of the huge Valles Marineris canyon system, has produced cliffs with examples of spur and gulley morphology and exposures of finely layered sediments, as seen in this NASA Mars Odyssey image.
PIA04083:
Melas Chasma Deposits
Full Resolution:     TIFF (3.369 MB)     JPEG (619.6 kB)
Add Image to Favorite List 2003-01-11 Mars 2001 Mars Odyssey
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The sinuous channels and streamlined islands at the junction of Shalbatana and Simud Vallis, seen in this NASA Mars Odyssey image, present an erosional history of the catastrophic floods that scoured the Martian surface hundreds of millions of years ago.
PIA04084:
Shalbatana/Simud Vallis Junction
Full Resolution:     TIFF (2.939 MB)     JPEG (494.3 kB)
Add Image to Favorite List 2003-01-15 Mars 2001 Mars Odyssey
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The relatively flat floor and terrace walls of this impact crater imaged by NASA's Mars Odyssey spacecraft suggest the crater was partly infilled with sediment and subsequently eroded to its present day form.
PIA04086:
Impact Crater
Full Resolution:     TIFF (2.761 MB)     JPEG (414.7 kB)
Add Image to Favorite List 2003-01-15 Mars 2001 Mars Odyssey
 THEMIS
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At first glance, this NASA Mars Odyssey image showing impact craters and linear ridges and troughs is typical of the southern highlands. However, upon closer examination migrating sand dunes are observed within the troughs.
PIA04087:
Southern Sand Dunes
Full Resolution:     TIFF (3.494 MB)     JPEG (857.6 kB)
Add Image to Favorite List 2003-01-17 Mars 2001 Mars Odyssey
 THEMIS
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The muted terrain of northern Acidalia Planitia, as seen in this image from NASA's Mars Odyssey spacecraft, testifies to the fact that the region is heavily mantled with dust.
PIA04088:
Ridges swimming in a sea of dust
Full Resolution:     TIFF (3.059 MB)     JPEG (486.2 kB)
Add Image to Favorite List 2003-01-17 Mars 2001 Mars Odyssey
 THEMIS
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In this image from NASA's Mars Odyssey spacecraft, striations on the floor of this sinuous channel adjacent to Protonilus Mensae look like they result from the flow of lava or perhaps even glacial ice.
PIA04089:
Evidence of flow?
Full Resolution:     TIFF (3.46 MB)     JPEG (770.4 kB)
Add Image to Favorite List 2003-01-22 Mars 2001 Mars Odyssey
 THEMIS
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The layered deposits in this Valles Marineris canyon imaged by NASA's Mars Odyssey spacecraft are heavily eroded by the wind into an impressive array of yardangs and swirling patterns of layers. The origin of the deposits remains a mystery.
PIA04090:
Layered Deposits in Western Candor Chasma
Full Resolution:     TIFF (3.308 MB)     JPEG (610 kB)
Add Image to Favorite List 2003-01-22 Mars 2001 Mars Odyssey
 THEMIS
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The impact crater in this NASA Mars Odyssey image is a model illustration of the effects of erosion on Mars. The degraded crater rim and several landslides observed in crater walls are evidence of the mass wasting of materials.
PIA04091:
Erosion Effects
Full Resolution:     TIFF (3.203 MB)     JPEG (597 kB)
Add Image to Favorite List 2003-01-24 Mars 2001 Mars Odyssey
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This image from NASA's Mars Odyssey spacecraft shows crater wall dust avalanches in southern Arabia Terra.
PIA04092:
Dust Avalanches
Full Resolution:     TIFF (2.777 MB)     JPEG (325.6 kB)
Add Image to Favorite List 2003-01-24 Mars 2001 Mars Odyssey
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The bizarre patterns on the floor of this crater in Nilosyrtis Mensae imaged by NASA's Mars Odyssey defy an easy explanation. It is possible that some form of periglacial process combined with the vaporization of ground ice to form these patterns.
PIA04093:
Concentric Crater Fill
Full Resolution:     TIFF (3.028 MB)     JPEG (436.7 kB)
Add Image to Favorite List 2003-01-28 Mars 2001 Mars Odyssey
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The ejecta of the impact crater shown in this image from NASA's Mars Odyssey spacecraft appears to have been modified after it was emplaced. This modification may be due to the presence of subsurface ground ice.
PIA04094:
Elysium Planitia
Full Resolution:     TIFF (3.128 MB)     JPEG (545.5 kB)
Add Image to Favorite List 2003-01-28 Mars 2001 Mars Odyssey
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This image from NASA's Mars Odyssey spacecraft shows old, heavily cratered volcanic terrain in Terra Tyrrhena within the Martian southern highlands.
PIA04095:
Terra Tyrrhena
Full Resolution:     TIFF (2.522 MB)     JPEG (309.2 kB)
Add Image to Favorite List 2003-01-30 Mars 2001 Mars Odyssey
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In this image from NASA's Mars Odyssey, the late afternoon sun casts a shadow over a rim of Huygens Crater that's 700 meters (nearly 2,300 feet) high.
PIA04096:
Crater Rim
Full Resolution:     TIFF (2.968 MB)     JPEG (361.7 kB)
Add Image to Favorite List 2003-01-30 Mars 2001 Mars Odyssey
 THEMIS
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The floors of these craters imaged by NASA's Mars Odyssey contain very interesting and enigmatic materials that may hold shallow subsurface ground ice with varying amounts of a sediment covering (mantle).
PIA04097:
Nilosyrtis Mensae
Full Resolution:     TIFF (3.301 MB)     JPEG (551.7 kB)
Add Image to Favorite List 2003-02-03 Mars 2001 Mars Odyssey
 THEMIS
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A broad channel in the Deuteronilus Mensae region, shown in this NASA Mars Odyssey image, displays the strange landforms common to the northern mid-latitudes where ground ice likely plays a role in their formation.
PIA04098:
Mamers Valles
Full Resolution:     TIFF (3.06 MB)     JPEG (481.7 kB)
Add Image to Favorite List 2003-02-03 Mars 2001 Mars Odyssey
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The large sand sheets and dunes observed in this image from NASA's Mars Odyssey are located near the north pole of Mars. Changes in surface albedo across the image are likely due to variable thicknesses of dark sand that covers lighter surfaces.
PIA04099:
Chasma Boreal Dunes
Full Resolution:     TIFF (2.176 MB)     JPEG (253.8 kB)
Add Image to Favorite List 2003-02-07 Mars 2001 Mars Odyssey
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In this NASA Mars Odyssey image of eastern Arabia Terra, remnants of a once vast layered terrain are evident as isolated buttes, mesas, and deeply-filled craters.
PIA04400:
Remnants of Lost Geology
Full Resolution:     TIFF (2.892 MB)     JPEG (395.3 kB)
Add Image to Favorite List 2003-02-07 Mars 2001 Mars Odyssey
 THEMIS
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The dust devil streaks observed in this NASA Mars Odyssey image of the Martian northern plains trend over hills, mounds and valleys, giving hints to the dynamic nature in which these streaks are formed.
PIA04401:
Dust Devil Streaks
Full Resolution:     TIFF (3.414 MB)     JPEG (805.4 kB)
Add Image to Favorite List 2003-02-10 Mars 2001 Mars Odyssey
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Eroded, or 'etched' terrain dominates the field of view of this image from NASA's Mars Odyssey spacecraft, acquired over eastern Terra Meridiani. At the bottom of many craters and in other areas, dunes are present.
PIA04402:
Etched Terrain in Terra Meridiani
Full Resolution:     TIFF (3.532 MB)     JPEG (794.8 kB)
Add Image to Favorite List 2003-02-10 Mars 2001 Mars Odyssey
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This image from NASA's Mars Odyssey spacecraft shows an impact crater with a rampart ejecta blanket in Arabia Terra.
PIA04403:
Arabia Terra
Full Resolution:     TIFF (3.179 MB)     JPEG (444.3 kB)
Add Image to Favorite List 2003-02-12 Mars 2001 Mars Odyssey
 THEMIS
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Accumulations of thick dust give way down slopes, crater walls, and other steep terrain in this image from NASA's Mars Odyssey, leaving the dark streaks that are common in the dusty region of Arabia Terra.
PIA04404:
Arabia Terra Streaks
Full Resolution:     TIFF (2.817 MB)     JPEG (329.6 kB)
Add Image to Favorite List 2003-02-12 Mars 2001 Mars Odyssey
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In this NASA Mars Odyssey image of western Acidalia, two craters of similar size dramatically display the effects of geologic activity. The younger one on the left has been left relatively well preserved.
PIA04405:
A Tale of Two Craters
Full Resolution:     TIFF (3.065 MB)     JPEG (635.5 kB)
Add Image to Favorite List 2003-02-14 Mars 2001 Mars Odyssey
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Heavy water ice clouds almost completely obscure the surface in Vastitas Borealis, as seen in this image from NASA's Mars Odyssey spacecraft.
PIA04406:
Ice Clouds
Full Resolution:     TIFF (3.171 MB)     JPEG (919.2 kB)
Add Image to Favorite List 2003-02-14 Mars 2001 Mars Odyssey
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This somewhat cloudy image from NASA's Mars Odyssey spacecraft shows a stunning example of layered deposits in Terby crater, just north of the Hellas impact basin.
PIA04407:
Layered Deposits in Terby Crater
Full Resolution:     TIFF (3.68 MB)     JPEG (913.7 kB)
Add Image to Favorite List 2003-02-19 Mars 2001 Mars Odyssey
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This visible-light image, taken by NASA's Mars Odyssey spacecraft, indicates that gullies on Martian crater walls may be carved by liquid water melting from remnant snow packs.
PIA04408:
Gullies on Martian Crater (THEMIS)
Full Resolution:     TIFF (989.3 kB)     JPEG (153.1 kB)
Add Image to Favorite List 2003-02-18 Mars 2001 Mars Odyssey
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The impact crater observed in this NASA Mars Odyssey image taken in Terra Cimmeria suggests sediments have filled the crater due to the flat and smooth nature of the floor compared to rougher surfaces at higher elevations.
PIA04410:
Crater Wall and Floor
Full Resolution:     TIFF (3.199 MB)     JPEG (468.1 kB)
Add Image to Favorite List 2003-02-20 Mars 2001 Mars Odyssey
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This image from NASA's Mars Odyssey spacecraft shows Granicus Vallis, which is located northwest of the Elysium volcanic complex and may owe its origin to the interaction of volcanic heating and subsurface ground ice.
PIA04411:
Granicus Vallis
Full Resolution:     TIFF (3.098 MB)     JPEG (623.1 kB)
Add Image to Favorite List 2003-02-20 Mars 2001 Mars Odyssey
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Freedom crater, located in Acidalia Planitia, exhibits a concentric ring pattern in its interior as seen in this image from NASA's Mars Odyssey spacecraft, suggesting that there has been some movement of these materials towards the center of the crater.
PIA04412:
Freedom Crater
Full Resolution:     TIFF (3.129 MB)     JPEG (515.1 kB)
Add Image to Favorite List 2003-02-26 Mars 2001 Mars Odyssey
 THEMIS
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The sinuous channel in this NASA Mars Odyssey image begins at the edge of Cerulli Crater in northern Arabia and snakes its way across 1,000 km (621 miles) of cratered highlands before reaching Deuteronilus Mensae at the boundary of the northern lowlands.
PIA04428:
Mamers Vallis
Full Resolution:     TIFF (2.998 MB)     JPEG (451.9 kB)
Add Image to Favorite List 2003-02-26 Mars 2001 Mars Odyssey
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This image from NASA's Mars Odyssey spacecraft shows the easternmost end of Valles Marineris, where a rugged, jumbled terrain known as chaos displays a stratigraphy that could be described as precarious.
PIA04429:
Arsinoes Chaos
Full Resolution:     TIFF (3.421 MB)     JPEG (581.1 kB)
Add Image to Favorite List 2003-02-26 Mars 2001 Mars Odyssey
 THEMIS
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The top half of this NASA Mars Odyssey image shows interior layered deposits that have long been recognized in Valles Marineris. Upon close examination, the layers appear to be eroding differently, indicating different levels of competency.
PIA04430:
Valles Marineris - with 3-D
Full Resolution:     TIFF (3.357 MB)     JPEG (713.5 kB)
Add Image to Favorite List 2003-02-26 Mars 2001 Mars Odyssey
 THEMIS
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The long sharp-crested features observed in this image from NASA's Mars Odyssey spacecraft are named yardangs. Yardangs form by wind erosion and typically lie in the direction of the dominant wind.
PIA04431:
Lycus Sulci
Full Resolution:     TIFF (3.601 MB)     JPEG (1.021 MB)
Add Image to Favorite List 2003-03-06 Mars 2001 Mars Odyssey
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This image from NASA's Mars Odyssey spacecraft shows grooves within channels of Kasei Valles that can be interpreted as evidence for fluvial activity.
PIA04434:
Kasei Vallis
Full Resolution:     TIFF (2.885 MB)     JPEG (399.7 kB)
Add Image to Favorite List 2003-03-06 Mars 2001 Mars Odyssey
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The wind-sculpted yardangs in this scene from NASA's Mars Odyssey spacecraft are part of the Medusae Fossae Formation, a regionally extensive geologic unit that probably was produced from the accumulation of volcanic ash.
PIA04435:
Memnonia Sulci
Full Resolution:     TIFF (3.632 MB)     JPEG (743 kB)
Add Image to Favorite List 2003-03-06 Mars 2001 Mars Odyssey
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The large crater at the top of this image from NASA's Mars Odyssey spacecraft has several other craters inside of it. Most noticeable are the craters that form a 'chain' on the southern wall of the large crater.
PIA04436:
Crater Chains
Full Resolution:     TIFF (3.097 MB)     JPEG (464.6 kB)
Add Image to Favorite List 2003-03-06 Mars 2001 Mars Odyssey
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With its rim eroded off by catastrophic floods in Tiu Vallis and its strangely angular shape, this 12 km (about 7.5 mile) diameter crater imaged by NASA's Mars Odyssey spacecraft looks vaguely like a stop sign.
PIA04437:
Stop Sign Crater
Full Resolution:     TIFF (3.102 MB)     JPEG (561.3 kB)
Add Image to Favorite List 2003-03-07 Mars 2001 Mars Odyssey
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An unusual mix of textures is featured in this image from NASA's Mars Odyssey spacecraft of a surface east of the Phlegra Montes. Scabby mounds, commonly occurring around degraded craters, mix with a more muted, knobby terrain.
PIA04438:
Textures in Arcadia Planitia
Full Resolution:     TIFF (3.519 MB)     JPEG (822 kB)
Add Image to Favorite List 2003-03-07 Mars 2001 Mars Odyssey
 THEMIS
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Hrad Vallis, seen in this NASA Mars Odyssey image, appears to be affecting the local wind patterns. The texture of the terrain just around the valleys is markedly different from that its surroundings.
PIA04439:
Hrad Vallis
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Add Image to Favorite List 2003-03-13 Mars 2001 Mars Odyssey
 Gamma Ray Spectrometer Suite
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This gamma ray spectrometer map from NASA's Mars Odyssey of the mid-latitude region of Mars is based on gamma-rays from the element iron, one of the most abundant elements on Mars and Earth. It is responsible for the red color on the surface of Mars.
PIA04253:
Map of Martian Iron at Mid-Latitudes
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Add Image to Favorite List 2003-03-13 Mars 2001 Mars Odyssey
 Gamma Ray Spectrometer Suite
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NASA's Mars Odyssey spacecraft produced this gamma ray spectrometer map, which is centered on the north pole of Mars and based on gamma-rays from the element hydrogen. In this region, hydrogen is mainly in the form of water ice.
PIA04254:
Map of Martian Polar Hydrogen
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Add Image to Favorite List 2003-03-13 Mars 2001 Mars Odyssey
 Gamma Ray Spectrometer Suite
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The element potassium, shown on this NASA Mars Odyssey gamma ray spectrometer map of the mid-latitude region of Mars, is a naturally radioactive element and is a minor constituent of rocks on the surface of both Mars and Earth.
PIA04255:
Map of Martian Potassium at Mid-Latitudes
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Add Image to Favorite List 2003-03-13 Mars 2001 Mars Odyssey
 Gamma Ray Spectrometer Suite
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NASA's Mars Odyssey produced this gamma ray spectrometer map of the mid-latitude region of Mars is based on gamma-rays from the element silicon, one of the most abundant elements on the surface of both Mars and Earth.
PIA04256:
Map of Martian Silicon at Mid-Latitudes
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Add Image to Favorite List 2003-03-13 Mars 2001 Mars Odyssey
 Gamma Ray Spectrometer Suite
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Thorium is a naturally radioactive element that exists in rocks and soils in extremely small amounts. The region of highest thorium content, shown in red on this gamma ray spectrometer map from NASA's Mars Odyssey, is in northern Acidalia Planitia.
PIA04257:
Map of Martian Thorium at Mid-Latitudes
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Add Image to Favorite List 2003-03-13 Mars 2001 Mars Odyssey
 Mars Radiation Experiment
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This graphic shows the radiation dose equivalent as measured by NASA's Mars Odyssey and by instruments aboard the International Space Station, for the 11-month period from April 2002 through February 2003.
PIA04258:
Comparison of Martian Radiation Environment with International Space Station
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Add Image to Favorite List 2003-03-13 Mars 2001 Mars Odyssey
 THEMIS
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This mosaic of daytime infrared images of Gusev Crater, taken by NASA's Mars Odyssey spacecraft, has been draped over topography data obtained by NASA's Mars Global Surveyor.
PIA04260:
Gusev Crater
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Add Image to Favorite List 2003-03-13 Mars 2001 Mars Odyssey
 THEMIS
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Images from NASA's Mars Odyssey spacecraft were used to create this mosaic of nighttime infrared images of Gusev Crater, which has been draped over topography data obtained by NASA's Mars Global Surveyor.
PIA04261:
Gusev Crater
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Add Image to Favorite List 2003-03-13 Mars 2001 Mars Odyssey
 THEMIS
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This image from NASA's Mars Odyssey spacecraft shows part of Ganges Chasma in Valles Marineris. The colors indicate compositional variations in the rocks exposed in the wall and floor of Ganges and in the dust and sand on the rim of the canyon.
PIA04262:
Ganges Chasma
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Add Image to Favorite List 2003-03-13 Mars 2001 Mars Odyssey
 THEMIS
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This is a NASA Mars Odyssey visible color image of an unnamed crater in western Arcadia Planitia. The crater shows a number of interesting internal and external features that suggest that it has undergone substantial modification since it formed.
PIA04263:
Western Arcadia Planitia
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Add Image to Favorite List 2003-03-14 Mars 2001 Mars Odyssey
 THEMIS
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In this image from NASA's Mars Odyssey spacecraft, numerous lava flows and fossae (cracks) are visible in a region of Mars located southeast of Olympus Mons. There is also a hint that water may have possibly flowed in the region.
PIA04440:
Gordii Fossae
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Add Image to Favorite List 2003-03-14 Mars 2001 Mars Odyssey
 THEMIS
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The smooth plains of Elysium embay the blocky broken up highlands of Aeolis in this image from NASA's Mars Odyssey spacecraft. The plains have been interpreted by researchers to be possibly mudflows or lava flows.
PIA04441:
Highland/Lowland contact
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Add Image to Favorite List 2003-03-14 Mars 2001 Mars Odyssey
 THEMIS
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This NASA Mars Odyssey image shows 'Lycus Sulci,' a region of ridges and hills located north-northwest of the volcano Olympus Mons. Several dust avalanches on the flanks of the roughly textured surfaces suggest a thick coating of fine-grained materials.
PIA04442:
Lycus Sulci
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Add Image to Favorite List 2003-03-19 Mars 2001 Mars Odyssey
 THEMIS
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Dunes in the Vastitas Borealis region of Mars are seen in this image from NASA's Mars Odyssey spacecraft. These sand seas migrate around the north polar cap following the strong polar vortex winds.
PIA04443:
Polar Dunes
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Add Image to Favorite List 2003-03-19 Mars 2001 Mars Odyssey
 THEMIS
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Just north of the hematite deposit in Meridiani Planum, the remnants of a formerly extensive layer of material remain as isolated knobs and buttes in this image from NASA's Mars Odyssey spacecraft.
PIA04444:
Martian Braille
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Add Image to Favorite List 2003-03-19 Mars 2001 Mars Odyssey
 THEMIS
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Pavonis Mons is the middle of the three large volcanoes on the Tharsis bulge. This image from NASA's Mars Odyssey spacecraft covers the edge of the volcano's caldera. Outside of the caldera, numerous lava flows and impact craters can be seen.
PIA04445:
Pavonis Mons Caldera
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Add Image to Favorite List 2003-03-22 Mars 2001 Mars Odyssey
 THEMIS
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The fluidized impact crater ejecta and flat crater floors observed in this image from NASA's Mars Odyssey spacecraft suggest near-surface volatiles once played an important role in modifying the Martian surface.
PIA04446:
Impact Craters
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Add Image to Favorite List 2003-03-22 Mars 2001 Mars Odyssey
 THEMIS
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The floor of the crater in this NASA Mars Odyssey image displays interesting textures and it appears to have been flooded by some type of material. It is unclear if this material was fluvially emplaced mud (hyperconcentrated flows) or lava.
PIA04447:
Flooded Crater in Terra Sirenum
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Add Image to Favorite List 2003-03-22 Mars 2001 Mars Odyssey
 THEMIS
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In this image from NASA's Mars Odyssey, eroded mesas and secondary craters dot the landscape in an area of Cydonia Mensae. The single oval-shaped crater displays a 'butterfly' ejecta pattern, indicating that the crater formed from a low-angle impact.
PIA04448:
Cydonia Craters
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Add Image to Favorite List 2003-03-27 Mars 2001 Mars Odyssey
 THEMIS
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The eroded, layered deposit in this NASA Mars Odyssey image of Gale Crater is a mound of material rising 3 km (about 2 miles) above the crater floor. It has been sculpted by wind and possibly water to produce the dramatic landforms seen today.
PIA04449:
Gale Crater Mound
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Add Image to Favorite List 2003-03-27 Mars 2001 Mars Odyssey
 THEMIS
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This is an image from NASA's Mars Odyssey spacecraft of an area within Acidalia Planitia that contains patterned ground (near the top of the image). This type of surface is likely related to subsurface ice.
PIA04450:
Acidalia Planitia
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Add Image to Favorite List 2003-04-02 Mars 2001 Mars Odyssey
 THEMIS
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In this image from NASA's Mars Odyssey spacecraft showing a location about 1,000 km (620 miles) west of the massive Elysium volcanic complex, a system of branching troughs shows a continuum of features that provides clues to its origin.
PIA04451:
Hebrus Valles
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Add Image to Favorite List 2003-04-02 Mars 2001 Mars Odyssey
 THEMIS
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This image from NASA's Mars Odyssey spacecraft shows relatively dark coarse grained material forming individual dunes coalescing into a relatively uniform sand sheet.
PIA04452:
Dunes
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Add Image to Favorite List 2003-04-02 Mars 2001 Mars Odyssey
 THEMIS
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The slumping of materials in the walls of this impact crater imaged by NASA's Mars Odyssey spacecraft illustrates the continued erosion of the Martian surface. Small fans of debris as well as larger landslides are observed throughout the image.
PIA04453:
Landslides
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Add Image to Favorite List 2003-04-04 Mars 2001 Mars Odyssey
 THEMIS
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This image from NASA's Mars Odyssey spacecraft shows a flooded crater in Amazonis Planitia. This crater has been either flooded with mud and or lava. The fluid then ponded up, dried and formed the surface textures we see today.
PIA04454:
Flooded Crater
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Add Image to Favorite List 2003-04-04 Mars 2001 Mars Odyssey
 THEMIS
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Interesting textures on lava flows in Daedalia Planum, southwest of the Tharsis volcanoes, can by observed in this image from NASA's Mars Odyssey spacecraft.
PIA04455:
Daedalia Planum
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Add Image to Favorite List 2003-04-04 Mars 2001 Mars Odyssey
 THEMIS
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The small mounds with summit depressions in the northern part of this NASA Mars Odyssey image have an unknown origin. Some scientists think they may be cinder cones, while others think they may be pseudocraters, formed by the interaction of lava and ice.
PIA04456:
Acidalia Planitia
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Add Image to Favorite List 2003-04-09 Mars 2001 Mars Odyssey
 THEMIS
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The mottled surface texture and flow features observed in this NASA Mars Odyssey image suggest materials may be, or have been, mixed with ice. There is also evidence in some areas for infilling of sediments as crater rims and ridges appear covered.
PIA04457:
Surface Erosion and Flow
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Add Image to Favorite List 2003-04-09 Mars 2001 Mars Odyssey
 THEMIS
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This image from NASA's Mars Odyssey spacecraft shows the Olympica Fossae channel system located east of the Olympus Mons volcano in Tharsis. These anastomosing channels cut numerous lava flows indicating that the channels are younger than the lava flows.
PIA04458:
Olympica Fossae
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Add Image to Favorite List 2003-04-09 Mars 2001 Mars Odyssey
 THEMIS
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In the high northern latitudes northwest of Alba Patera, a smooth mantle of material that covers the landscape appears chipped away from the rim of a large crater, as observed in this image from NASA's Mars Odyssey spacecraft.
PIA04459:
Chipped Paint Crater
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