Mission Mars Odyssey - 2

<h1>PIA04064: Terra Meridiani</h1><div class="PIA04064" lang="en" style="width:488px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04064_context.jpg"></a><br><p>This image 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. This exposing another layer of material directly underneath that is visible in the central portion of the image. Measurements from another instrument in orbit around Mars, the Thermal Emission Spectrometer on the Mars Global Surveyor, indicate that this region has a high concentration of a mineral called hematite. Grey hematite can form in both volcanic and water rich environments. It is not certain exactly how this mineral formed on Mars, but its presence along with the layering seen in this region makes this region of Mars particularly interesting. Among other possibilities, these layers could be volcanic ash deposits or plausibly sediments deposited in water. This region of Mars is very old and whatever process took place here, it happened long ago. This is one of the principal candidate sites for the next rover mission that will be sent to Mars in 2003.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04064" onclick="window.open(this.href); return false;" title="Voir l'image PIA04064: Terra Meridiani sur le site de la NASA">Voir l'image PIA04064: Terra Meridiani sur le site de la NASA.</a></div>
PIA04064: Terra Meridiani
<h1>PIA04065: Lava Flows of Daedalia Planum</h1><div class="PIA04065" lang="en" style="width:477px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04065_context.jpg"></a><br><p>This THEMIS 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 seen. The lobate edges of the flows are distinctive, and permit the discrimination of many overlapping individual flows. The surfaces of some flows look wrinkly and ropy, probably indicating a relatively fluid type of lava flow referred to as pahoehoe. The surface textures of lava flows can thus sometimes be used for comparative purposes to infer lava viscosity and effusion rates. Numerous parallel curved ridges are visible on the upper surfaces of some of the lava flows. These ridges make the flow surface look somewhat ropy, and at smaller scales this flow might be referred to as pahoehoe, however, these features are probably better referred to as pressure ridges. Pressure ridges form on the surface of a lava flow when the upper part of the flow is exposed to air, cooling it, but the insulated much warmer interior of the flow continues to move down slope (and more material is pushed forward from behind), causing the surface to compress and pile up like a rug.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04065" onclick="window.open(this.href); return false;" title="Voir l'image PIA04065: Lava Flows of Daedalia Planum sur le site de la NASA">Voir l'image PIA04065: Lava Flows of Daedalia Planum sur le site de la NASA.</a></div>
PIA04065: Lava Flows of Daedalia Planum
<h1>PIA04066: Reull Vallis</h1><div class="PIA04066" lang="en" style="width:463px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04066_context.jpg"></a><br><p>Reull Vallis (from the Gaelic word for planet) located in the Promethei Terra region of Mars' cratered southern hemisphere flows for over 1,000 km towards the Hellas basin. This THEMIS image shows a portion of the channel with its enigmatic lineated floor deposits. These deposits are most likely rich in volatiles such as ice. The southern wall of the channel exhibits an obvious spur and gully topography. Several round impact craters are visible on the channel floor. Numerous crescentic features are also observed on the floor material. Could these crescentic features be older flow distorted craters? The THEMIS team will continue to study these features in detail.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04066" onclick="window.open(this.href); return false;" title="Voir l'image PIA04066: Reull Vallis sur le site de la NASA">Voir l'image PIA04066: Reull Vallis sur le site de la NASA.</a></div>
PIA04066: Reull Vallis
<h1>PIA04068: Coprates Chasma Landslide</h1><div class="PIA04068" lang="en" style="width:482px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04068_context.jpg"></a><br><p>Coprates Chasma comprises the central portion of the Valles Marineris canyon system complex. This image of the southern wall of Coprates Chasma contains a landslide deposit with dunes over portions of slide. Landslides have very characteristic morphologies on Earth, which they also display on Mars. These morphologies include a distinctive escarpment at the uppermost part of the landslide--called a head scarp (seen at the bottom of this image), a down-dropped block of material below that escarpment that dropped almost vertically, and a deposit of debris that moved away from the escarpment at high speed. In this example, the wall rock displayed in the upper part of the cliff contains spurs and chutes created by differing amounts of erosion. The actual landslide deposit is delineated by its fan-shape and lobate margins. The dunes subsequently marched upon the landslide deposit.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04068" onclick="window.open(this.href); return false;" title="Voir l'image PIA04068: Coprates Chasma Landslide sur le site de la NASA">Voir l'image PIA04068: Coprates Chasma Landslide sur le site de la NASA.</a></div>
PIA04068: Coprates Chasma Landslide
<h1>PIA04069: Pavonis Mons Summit Caldera</h1><div class="PIA04069" lang="en" style="width:488px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04069_context.jpg"></a><br><p>This image shows part of the summit caldera of Pavonis Mons. Pavonis the middle of three Tharsis volcanos that form a line southeast of Olympus Mons and northwest of Vallis Marineris. On Earth volcanic calderas usually form when a massive eruption has emptied out the magma chamber and the "roof" of the chamber collapses into the resultant space. It is likely that summit calderas on Martian volcanoes form in a similar manner.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04069" onclick="window.open(this.href); return false;" title="Voir l'image PIA04069: Pavonis Mons Summit Caldera sur le site de la NASA">Voir l'image PIA04069: Pavonis Mons Summit Caldera sur le site de la NASA.</a></div>
PIA04069: Pavonis Mons Summit Caldera
<h1>PIA04070: Scaly-skinned Mars</h1><div class="PIA04070" lang="en" style="width:488px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04070_context.jpg"></a><br><p>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. In reality, a very clear process of landscape degradation is evident in this image. Some process has produced polygon-shaped troughs that create zones of weakness in the uppermost crust. It is likely that wind-blown particles deepen and widen the troughs, producing isolated knobs and mesas. Ultimately, the erosional reworking of the landscape is so complete that all signs of the upper layer are removed, leaving the smooth lowland surface to the north.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04070" onclick="window.open(this.href); return false;" title="Voir l'image PIA04070: Scaly-skinned Mars sur le site de la NASA">Voir l'image PIA04070: Scaly-skinned Mars sur le site de la NASA.</a></div>
PIA04070: Scaly-skinned Mars
<h1>PIA04071: Kasei Vallisland</h1><div class="PIA04071" lang="en" style="width:485px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04071_context.jpg"></a><br></p><p>A large streamlined island in Kasei Vallis shows evidence of scour on its surface, probably from floods that preceded the formation of the island.</p><p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04071" onclick="window.open(this.href); return false;" title="Voir l'image PIA04071: Kasei Vallisland sur le site de la NASA">Voir l'image PIA04071: Kasei Vallisland sur le site de la NASA.</a></div>
PIA04071: Kasei Vallisland
<h1>PIA04072: Holden Crater</h1><div class="PIA04072" lang="en" style="width:476px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04072_context.jpg"></a><br><p>Ripple bedforms fill large fractures near the southern rim of Holden Crater.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04072" onclick="window.open(this.href); return false;" title="Voir l'image PIA04072: Holden Crater sur le site de la NASA">Voir l'image PIA04072: Holden Crater sur le site de la NASA.</a></div>
PIA04072: Holden Crater
<h1>PIA04073: Impact crater</h1><div class="PIA04073" lang="en" style="width:494px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04073_context.jpg"></a><br><p>Dark streaks emanating from within impact crater walls show evidence for mass movement of materials.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04073" onclick="window.open(this.href); return false;" title="Voir l'image PIA04073: Impact crater sur le site de la NASA">Voir l'image PIA04073: Impact crater sur le site de la NASA.</a></div>
PIA04073: Impact crater
<h1>PIA04074: Pit-chain in Noctis Labyrinthus</h1><div class="PIA04074" lang="en" style="width:483px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04074_context.jpg"></a><br><p>These pit-chain features in south Noctis Labryinthus are oriented parallel to grabens in the area, suggesting that tensional stresses may have been responsible for their formation.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04074" onclick="window.open(this.href); return false;" title="Voir l'image PIA04074: Pit-chain in Noctis Labyrinthus sur le site de la NASA">Voir l'image PIA04074: Pit-chain in Noctis Labyrinthus sur le site de la NASA.</a></div>
PIA04074: Pit-chain in Noctis Labyrinthus
<h1>PIA04075: Textures in Utopia Planitia</h1><div class="PIA04075" lang="en" style="width:507px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04075_context.jpg"></a><br><p>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.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04075" onclick="window.open(this.href); return false;" title="Voir l'image PIA04075: Textures in Utopia Planitia sur le site de la NASA">Voir l'image PIA04075: Textures in Utopia Planitia sur le site de la NASA.</a></div>
PIA04075: Textures in Utopia Planitia
<h1>PIA04076: Hecates Tholus</h1><div class="PIA04076" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04076_context.jpg"></a><br><p>Impact craters in Hecates Tholus appear to be filled with sediment derived from erosion of the surrounding terrain.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04076" onclick="window.open(this.href); return false;" title="Voir l'image PIA04076: Hecates Tholus sur le site de la NASA">Voir l'image PIA04076: Hecates Tholus sur le site de la NASA.</a></div>
PIA04076: Hecates Tholus
<h1>PIA04077: Channels near Lucus Planum</h1><div class="PIA04077" lang="en" style="width:494px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04077_context.jpg"></a><br><p>Streamlined channels near Lucus Planum. These features were formed by catastrophic floods in the Martian past.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04077" onclick="window.open(this.href); return false;" title="Voir l'image PIA04077: Channels near Lucus Planum sur le site de la NASA">Voir l'image PIA04077: Channels near Lucus Planum sur le site de la NASA.</a></div>
PIA04077: Channels near Lucus Planum
<h1>PIA04078: A Sea of Lava</h1><div class="PIA04078" lang="en" style="width:483px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04078_context.jpg"></a><br><p>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.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.<p>Image information: VIS instrument. Latitude 10.6, Longitude 158.5 East (201.5 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04078" onclick="window.open(this.href); return false;" title="Voir l'image PIA04078: A Sea of Lava sur le site de la NASA">Voir l'image PIA04078: A Sea of Lava sur le site de la NASA.</a></div>
PIA04078: A Sea of Lava
<h1>PIA04079: Cerberus Rupes</h1><div class="PIA04079" lang="en" style="width:489px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04083_context.jpg"></a><br><p>Fractures within the volcanic plains south of Elysium Mons.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.<p>Image information: VIS instrument. Latitude 24.1, Longitude 192 East (168 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04079" onclick="window.open(this.href); return false;" title="Voir l'image PIA04079: Cerberus Rupes sur le site de la NASA">Voir l'image PIA04079: Cerberus Rupes sur le site de la NASA.</a></div>
PIA04079: Cerberus Rupes
<h1>PIA04080: Resurfaced Mars</h1><div class="PIA04080" lang="en" style="width:481px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04080_context.jpg"></a><br><p>This area of Mars shows a wonderful example of relative geologic dating. Ancient lava flows and escarpments are mantled by younger impact ejecta, which was subsequently cut by a younger graben and resurfaced by smaller impact craters.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.<p>Image information: VIS instrument. Latitude 10.6, Longitude 233.4 East (126.6 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04080" onclick="window.open(this.href); return false;" title="Voir l'image PIA04080: Resurfaced Mars sur le site de la NASA">Voir l'image PIA04080: Resurfaced Mars sur le site de la NASA.</a></div>
PIA04080: Resurfaced Mars
<h1>PIA04081: Complex and Perplexing Mars</h1><div class="PIA04081" lang="en" style="width:471px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04081_context.jpg"></a><br><p>A variegated mottled texture is readily apparent in this terrain located NW of the volcano, Elysium Mons. The Hrad Vallis (the Armenian word for Mars) channel system can be seen sauntering across the bumpy landscape of Utopia Planitia. The upper branch of Hrad Vallis has a large chunk of material on its floor; this chunk appears to have been rafted away from the material on the far left of the image (moved from left to right). This unusual because the channel flows toward the left. This material may be lava flows. Many craters in this region of the planet have their interiors filled with material. Pedestal craters (craters with ejecta blankets perched higher than the surrounding plains) are also found in these regions. These observations seem to imply that this region was once buried and has now been uncovered (exhumed). The exact causes and timing of these events are unknown.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.<p>Image information: VIS instrument. Latitude 40.6, Longitude 134.2 East (225.8 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04081" onclick="window.open(this.href); return false;" title="Voir l'image PIA04081: Complex and Perplexing Mars sur le site de la NASA">Voir l'image PIA04081: Complex and Perplexing Mars sur le site de la NASA.</a></div>
PIA04081: Complex and Perplexing Mars
<h1>PIA04082: Candor Chasma Mesa</h1><div class="PIA04082" lang="en" style="width:488px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04082_context.jpg"></a><br><p>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.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.<p>Image information: VIS instrument. Latitude -6.7, Longitude 286.4 East (73.6 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04082" onclick="window.open(this.href); return false;" title="Voir l'image PIA04082: Candor Chasma Mesa sur le site de la NASA">Voir l'image PIA04082: Candor Chasma Mesa sur le site de la NASA.</a></div>
PIA04082: Candor Chasma Mesa
<h1>PIA04083: Melas Chasma Deposits</h1><div class="PIA04083" lang="en" style="width:487px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04083_context.jpg"></a><br><p>Erosion of the interior layered deposits of Melas Chasma, part of the huge Valles Marineris canyon system, has produced cliffs with dramatic examples of spur and gulley morphology and beautiful exposures of finely layered sediments.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.<p>Image information: VIS instrument. Latitude -10.4, Longitude 284.9 East (75.1 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04083" onclick="window.open(this.href); return false;" title="Voir l'image PIA04083: Melas Chasma Deposits sur le site de la NASA">Voir l'image PIA04083: Melas Chasma Deposits sur le site de la NASA.</a></div>
PIA04083: Melas Chasma Deposits
<h1>PIA04084: Shalbatana/Simud Vallis Junction</h1><div class="PIA04084" lang="en" style="width:487px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04084_context.jpg"></a><br><p>The sinuous channels and streamlined islands at the junction of Shalbatana and Simud Vallis present an erosional history of the catastrophic floods that scoured the Martian surface hundreds of millions of years ago.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.<p>Image information: VIS instrument. Latitude 16, Longitude 317.4 East (42.6 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04084" onclick="window.open(this.href); return false;" title="Voir l'image PIA04084: Shalbatana/Simud Vallis Junction sur le site de la NASA">Voir l'image PIA04084: Shalbatana/Simud Vallis Junction sur le site de la NASA.</a></div>
PIA04084: Shalbatana/Simud Vallis Junction
<h1>PIA04085: IR view of lava flows</h1><div class="PIA04085" lang="en" style="width:273px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04085_context.jpg"></a><br><p>Located 1200 kilometers south of the giant shield volcano Arsia Mons, this infrared temperature image shows the flow margin of a young lava flow from Arsia that covers a much older flow. This young flow is 20 to 30 meters thick across most of its boundary edge. The large, unnamed crater at the bottom of the image is 12 kilometers across and has a depth of more than 700 meters.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.<p>VIS instrument. Latitude -30.1, Longitude 231.9 East (128.1 West). 100 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04085" onclick="window.open(this.href); return false;" title="Voir l'image PIA04085: IR view of lava flows sur le site de la NASA">Voir l'image PIA04085: IR view of lava flows sur le site de la NASA.</a></div>
PIA04085: IR view of lava flows
<h1>PIA04086: Impact Crater</h1><div class="PIA04086" lang="en" style="width:487px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04086_context.jpg"></a><br><p>The relatively flat floor and terrace walls of this impact crater suggest the crater was partly infilled with sediment and subsequently eroded to its present day form. This type of observation is evidence for environmental change throughout the geologic history of Mars.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.<p>Image information: VIS instrument. Latitude 18.1, Longitude 136.3 East (223.7 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04086" onclick="window.open(this.href); return false;" title="Voir l'image PIA04086: Impact Crater sur le site de la NASA">Voir l'image PIA04086: Impact Crater sur le site de la NASA.</a></div>
PIA04086: Impact Crater
<h1>PIA04087: Southern Sand Dunes</h1><div class="PIA04087" lang="en" style="width:470px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04087_context.jpg"></a><br><p>At first glance, this THEMIS 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. Sandy material can often accumulate in these narrow depressions and become mobilized by wind.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.<p>Image information: VIS instrument. Latitude -34.7, Longitude 281,5 East (68.5 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04087" onclick="window.open(this.href); return false;" title="Voir l'image PIA04087: Southern Sand Dunes sur le site de la NASA">Voir l'image PIA04087: Southern Sand Dunes sur le site de la NASA.</a></div>
PIA04087: Southern Sand Dunes
<h1>PIA04088: Ridges swimming in a sea of dust</h1><div class="PIA04088" lang="en" style="width:456px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04088_context.jpg"></a><br><p>The muted terrain of northern Acidalia Planitia testifies to the fact that the region is heavily mantled with dust. The most interesting features in this image are the small terraces located along the flanks of the ridges and the patterned ground seen at the base of the largest ridge (upper right). These features appear to be classic examples of periglacial landforms and may indicate the presence of shallow subsurface ice.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.<p>Image information: VIS instrument. Latitude 54.9, Longitude 351 East (9 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04088" onclick="window.open(this.href); return false;" title="Voir l'image PIA04088: Ridges swimming in a sea of dust sur le site de la NASA">Voir l'image PIA04088: Ridges swimming in a sea of dust sur le site de la NASA.</a></div>
PIA04088: Ridges swimming in a sea of dust
<h1>PIA04089: Evidence of flow?</h1><div class="PIA04089" lang="en" style="width:478px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04089_context.jpg"></a><br><p>The 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. However, it is also possible that they result from some process acting on permafrost confined within the channel having nothing to do with flow.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.<p>Image information: VIS instrument. Latitude 33.7, Longitude 56.8 East (303.2 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04089" onclick="window.open(this.href); return false;" title="Voir l'image PIA04089: Evidence of flow? sur le site de la NASA">Voir l'image PIA04089: Evidence of flow? sur le site de la NASA.</a></div>
PIA04089: Evidence of flow?
<h1>PIA04090: Layered Deposits in Western Candor Chasma</h1><div class="PIA04090" lang="en" style="width:488px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04090_context.jpg"></a><br><p>The layered deposits in this Valles Marineris canyon 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.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.<p>Image information: VIS instrument. Latitude -5.2, Longitude 282.7 East (77.3 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04090" onclick="window.open(this.href); return false;" title="Voir l'image PIA04090: Layered Deposits in Western Candor Chasma sur le site de la NASA">Voir l'image PIA04090: Layered Deposits in Western Candor Chasma sur le site de la NASA.</a></div>
PIA04090: Layered Deposits in Western Candor Chasma
<h1>PIA04091: Erosion Effects</h1><div class="PIA04091" lang="en" style="width:480px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04091_context.jpg"></a><br><p>The impact crater in this THEMIS image is a model illustration to the effects of erosion on Mars. The degraded crater rim and several landslides observed in crater walls is evidence to the mass wasting of materials. Layering in crater walls also suggests the presence of materials that erode at varying rates.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.<p>Image information: VIS instrument. Latitude 31.6, Longitude 44.3 East (315.7 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04091" onclick="window.open(this.href); return false;" title="Voir l'image PIA04091: Erosion Effects sur le site de la NASA">Voir l'image PIA04091: Erosion Effects sur le site de la NASA.</a></div>
PIA04091: Erosion Effects
<h1>PIA04092: Dust Avalanches</h1><div class="PIA04092" lang="en" style="width:490px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04092_context.jpg"></a><br><p>Crater wall dust avalanches in southern Arabia Terra.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.<p>Image information: VIS instrument. Latitude 10.3, Longitude 24.5 East (335.5 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04092" onclick="window.open(this.href); return false;" title="Voir l'image PIA04092: Dust Avalanches sur le site de la NASA">Voir l'image PIA04092: Dust Avalanches sur le site de la NASA.</a></div>
PIA04092: Dust Avalanches
<h1>PIA04093: Concentric Crater Fill</h1><div class="PIA04093" lang="en" style="width:478px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04093_context.jpg"></a><br><p>The bizarre patterns on the floor of this crater in Nilosyrtis Mensae defy an easy explanation. At 34 degrees north latitude, this location hardly qualifies as "Arctic" yet it is likely that some form of periglacial process possibly combined with the vaporization of ground ice is responsible for this intriguing landscape.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.<p>Image information: VIS instrument. Latitude 10.3, Longitude 24.5 East (284.5 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04093" onclick="window.open(this.href); return false;" title="Voir l'image PIA04093: Concentric Crater Fill sur le site de la NASA">Voir l'image PIA04093: Concentric Crater Fill sur le site de la NASA.</a></div>
PIA04093: Concentric Crater Fill
<h1>PIA04094: Elysium Planitia</h1><div class="PIA04094" lang="en" style="width:477px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04094_context.jpg"></a><br><p>The ejecta of this impact crater appears to have been modified after it was emplaced. This modification may be due to the presence of subsurface ground ice.<p>Another possible indicator of ground ice is the texture seen on the floor of the crater. One can also see a spur and gully morphology inside the crater along its rim illustrating differential erosion of various rock types.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.<p>Image information: VIS instrument. Latitude 34.8, Longitude 117.4 East (242.6 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04094" onclick="window.open(this.href); return false;" title="Voir l'image PIA04094: Elysium Planitia sur le site de la NASA">Voir l'image PIA04094: Elysium Planitia sur le site de la NASA.</a></div>
PIA04094: Elysium Planitia

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