Memnonia quadrangle

Coordinates: 15°00′S 157°30′W / 15°S 157.5°W / -15; -157.5
Source: Wikipedia, the free encyclopedia.
Memnonia quadrangle
Map of Memnonia quadrangle from Mars Orbiter Laser Altimeter (MOLA) data. The highest elevations are red and the lowest are blue.
Coordinates15°00′S 157°30′W / 15°S 157.5°W / -15; -157.5
Mangala Vallis. The north contains undulating wind-eroded deposits and the east contains lava flows from the Tharsis region
.

The Memnonia quadrangle is one of a series of 30 quadrangle maps of Mars used by the United States Geological Survey (USGS) Astrogeology Research Program. The Memnonia quadrangle is also referred to as MC-16 (Mars Chart-16).[1]

The quadrangle is a region of Mars that covers latitude -30° to 0° and longitude 135° to 180°.[2] The western part of Memnonia is a highly cratered highland region that exhibits a large range of crater degradation.

Memnonia includes these topographical regions of Mars:

Recently, evidence of water was found in the area. Layered sedimentary rocks were found in the wall and floor of

Columbus Crater. These rocks could have been deposited by water or by wind. Hydrated minerals were found in some of the layers, so water may have been involved.[3]

Many ancient river

Dark slope streaks and troughts (fossae) are present in this quadrangle. Part of the Medusae Fossae Formation
is found in the Memnonia quadrangle.

Layers

phyllosilicate) in some layers. Recent research with an orbiting near-infrared spectrometer, which reveals the types of minerals present based on the wavelengths of light they absorb, found evidence of layers of both clay and sulfates in Columbus crater.[5] This is exactly what would appear if a large lake had slowly evaporated.[6] Moreover, because some layers contained gypsum, a sulfate which forms in relatively fresh water, life could have formed in the crater.[7]

Scientists are excited about finding hydrated minerals such as

sulfates and clays on Mars because they are usually formed in the presence of water.[8] Places that contain clays and/or other hydrated minerals would be good places to look for evidence of life.[9]

Rock can form layers in a variety of ways. Volcanoes, wind, or water can produce layers.[10]

  • Columbus Crater Layers, as seen by HiRISE. This false-color image is about 800 feet across. Some of the layers contain hydrated minerals such as clay and sulfates.
    Columbus Crater Layers, as seen by HiRISE
    . This false-color image is about 800 feet across. Some of the layers contain hydrated minerals such as clay and sulfates.
  • Layers in Monument Valley. These are accepted as being formed, at least in part, by water deposition. Since Mars contains similar layers, water remains as a major cause of layering on Mars.
    Layers in Monument Valley. These are accepted as being formed, at least in part, by water deposition. Since Mars contains similar layers, water remains as a major cause of layering on Mars.
  • Layers in crater wall, as seen by HiRISE under HiWish program
    Layers in crater wall, as seen by HiRISE under HiWish program
  • Layers exposed at the base of a group of buttes in Mangala Valles in Memnonia quadrangle, as seen by HiRISE under HiWish program. Arrows point to boulders sitting in pits. The pits may have formed by winds, heat from the boulders melting ground ice, or some other process.
    Layers exposed at the base of a group of buttes in Mangala Valles in Memnonia quadrangle, as seen by HiRISE under HiWish program. Arrows point to boulders sitting in pits. The pits may have formed by winds, heat from the boulders melting ground ice, or some other process.
  • Crater displaying layers, as seen by HiRISE under HiWish program
    Crater displaying layers, as seen by HiRISE under HiWish program
  • Valley, as seen by HiRISE under HiWish program
    Valley, as seen by HiRISE under HiWish program

Mangala Vallis

Mangala Vallis is a major channel system that contains several basins which filled, then the overflow went through a series of spillways.[11][12] One source of waters for the system was Memonia Fossae, but water also probably came from a large basin centered at 40 degrees S.[13][14]

  • Mangala Valles, as seen by HiRISE.
    Mangala Valles, as seen by HiRISE.
  • Mangala Vallis with a streamlined island, as seen by THEMIS
    Mangala Vallis with a streamlined island, as seen by THEMIS
  • Streamlined feature in Mangala Vallis, as seen by HiRISE under HiWish program. Many dark slope streaks are visible. Location is Memnonia quadrangle.
    Streamlined feature in Mangala Vallis, as seen by HiRISE under HiWish program. Many
    dark slope streaks
    are visible. Location is Memnonia quadrangle.
  • Part of Mangala Valles, as seen by HiRISE under HiWish program. Location is Memnonia quadrangle.
    Part of Mangala Valles, as seen by HiRISE under HiWish program. Location is Memnonia quadrangle.

Craters

Impact craters generally have a rim with ejecta around them, in contrast volcanic craters usually do not have a rim or ejecta deposits. As craters get larger (greater than 10 km in diameter) they usually have a central peak.[15] The peak is caused by a rebound of the crater floor following the impact.[16] Sometimes craters will display layers. Since the collision that produces a crater is like a powerful explosion, rocks from deep underground are tossed unto the surface. Hence, craters can show us what lies deep under the surface. At times, bright rays surround craters because the impact has gone down to a bright layer of rocks, then thrown out the bright rocks on the darker surface. An image below from Mars Global Surveyor shows this.

  • Bright rays caused by impact throwing out a bright lower layer. Some bright layers contain hydrated minerals. Picture taken with Mars Global Surveyor, under the MOC Public Targeting Program.
    Bright rays caused by impact throwing out a bright lower layer. Some bright layers contain hydrated minerals. Picture taken with Mars Global Surveyor, under the MOC Public Targeting Program.
  • Small craters with thin ejecta, as seen by HiRISE under HiWish program
    Small craters with thin ejecta, as seen by HiRISE under HiWish program
  • Close-up of Columbus Crater, as seen by HiRISE
    Close-up of Columbus Crater, as seen by HiRISE
  • Nicholson Crater Central Mound, as seen by HiRISE. Click on image to see dark slope streak being diverted by an obstacle.
    Nicholson Crater
    Central Mound, as seen by HiRISE. Click on image to see dark slope streak being diverted by an obstacle.
  • Bernard Crater Floor, as seen by HiRISE. Large cracks are visible on floor.
    Bernard Crater
    Floor, as seen by HiRISE. Large cracks are visible on floor.
  • Troughs on the floor of Bernard Crater showing many boulders, as seen by HiRISE under HiWish program
    Troughs on the floor of
    Bernard Crater
    showing many boulders, as seen by HiRISE under HiWish program
  • Troughs on the floor of Bernard Crater, as seen by HiRISE under HiWish program
    Troughs on the floor of
    Bernard Crater
    , as seen by HiRISE under HiWish program
  • Dejnev Crater Floor, as seen by HiRISE. Scale bar is 500 meters long. Click on image to see large pits.
    Dejnev Crater
    Floor, as seen by HiRISE. Scale bar is 500 meters long. Click on image to see large pits.
  • Erosion of crater deposit in Lucus Planum, as seen by HiRISE under HiWish program
    Erosion of crater deposit in Lucus Planum, as seen by HiRISE under HiWish program
  • Close-up of layers in a pit on crater floor, as seen by HiRISE under HiWish program
    Close-up of layers in a pit on crater floor, as seen by HiRISE under HiWish program
  • Williams Crater, as seen by CTX camera (on Mars Reconnaissance Orbiter)
    Williams Crater, as seen by CTX camera (on Mars Reconnaissance Orbiter
    )
  • Middle section of Burton Crater, showing central mound, as seen by CTX camera (on Mars Reconnaissance Orbiter)
    Middle section of
    Burton Crater
    , showing central mound, as seen by CTX camera (on Mars Reconnaissance Orbiter)
  • Central mound of Burton Crater, showing dark slope streaks, as seen by CTX camera (on Mars Reconnaissance Orbiter). Note: this is an enlargement of the previous image of Burton Crater.
    Central mound of Burton Crater, showing
    dark slope streaks
    , as seen by CTX camera (on Mars Reconnaissance Orbiter). Note: this is an enlargement of the previous image of Burton Crater.
  • East side of Ejriksson Crater, as seen by CTX camera (on Mars Reconnaissance Orbiter)
    East side of
    Ejriksson Crater
    , as seen by CTX camera (on Mars Reconnaissance Orbiter)

Ridges

Ridges on Mars may be due to different causes. Long straight ridges are thought to be dikes. Curved and branched ridges may be examples of

inverted topography, and groups of straight ridges that cross each other may be the result of impacts. These intersecting box-like ridges are called linear ridge networks
. Linear ridge networks are found in various places on Mars in and around craters.[17] Ridges often appear as mostly straight segments that intersect in a lattice-like manner. They are hundreds of meters long, tens of meters high, and several meters wide. It is thought that impacts created fractures in the surface, these fractures later acted as channels for fluids. Fluids cemented the structures. With the passage of time, surrounding material was eroded away, thereby leaving hard ridges behind.

  • Wide view of region that displays ridges when enlarged. Picture taken with HiRISE under HiWish program.
    Wide view of region that displays ridges when enlarged. Picture taken with HiRISE under HiWish program.
  • Close view of ridges, as seen by HiRISE under HiWish program. Arrows point to some ridges.
    Close view of ridges, as seen by HiRISE under HiWish program. Arrows point to some ridges.
  • Close view of ridges, as seen by HiRISE under HiWish program
    Close view of ridges, as seen by HiRISE under HiWish program
  • Close view of ridges, as seen by HiRISE under HiWish program. Arrows point to some straight ridges.
    Close view of ridges, as seen by HiRISE under HiWish program. Arrows point to some straight ridges.
  • Close view of ridges, as seen by HiRISE under HiWish program
    Close view of ridges, as seen by HiRISE under HiWish program
  • Straight lines and ridges, as seen by HiRISE under HiWish program
    Straight lines and ridges, as seen by HiRISE under HiWish program

Yardangs

Yardangs are common in some regions on Mars, especially in what is called the "Medusae Fossae Formation."[18] They are formed by the action of wind on sand sized particles; hence they often point in the direction that the winds were blowing when they were formed.

Main article: Yardangs on Mars
  • Wide view of yardangs in Lucus Planum, as seen by HiRISE under HiWish program
    Wide view of yardangs in Lucus Planum, as seen by HiRISE under HiWish program
  • Close view of yardangs in previous image, as seen by HiRISE under HiWish program
    Close view of yardangs in previous image, as seen by HiRISE under HiWish program
  • Close view of yardangs from a previous image, as seen by HiRISE under HiWish program
    Close view of yardangs from a previous image, as seen by HiRISE under HiWish program
  • Close up of crater floor showing yardangs and dark slope streaks, as seen by HiRISE under HiWish program
    Close up of crater floor showing yardangs and dark slope streaks, as seen by HiRISE under HiWish program
  • Yardangs, as seen by HiRISE under HiWish program
    Yardangs, as seen by HiRISE under HiWish program
  • Yardangs, as seen by HiRISE under HiWish program
    Yardangs, as seen by HiRISE under HiWish program
  • Wide view of yardangs, as seen by HiRISE under HiWish program. This image is odd in that the yardangs are lined up in different directions in the top and bottom part of image. The wind direction probably changed to cause this.
    Wide view of yardangs, as seen by HiRISE under HiWish program. This image is odd in that the yardangs are lined up in different directions in the top and bottom part of image. The wind direction probably changed to cause this.

Dark slope streaks

Many places on Mars show

dust devils, that have cleared the panels and boosted the power. From these observations with the Rovers, we know that the process of dust coming out of the atmosphere then returning happens over and over.[23]

It is most generally accepted that the streaks represent avalanches of dust.

Nicholson Crater
. At least one streak in the image splits into two when encountering an obstacle.

Research, published in January 2012 in Icarus, found that dark streaks were initiated by airblasts from meteorites traveling at supersonic speeds. The team of scientists was led by Kaylan Burleigh, an undergraduate at the University of Arizona. After counting some 65,000 dark streaks around the impact site of a group of five new craters, patterns emerged. The number of streaks was greatest closer to the impact site. So, the impact somehow probably caused the streaks. Also, the distribution of the streaks formed a pattern with two wings extending from the impact site. The curved wings resembled scimitars, curved knives. This pattern suggests that an interaction of airblasts from the group of meteorites shook dust loose enough to start dust avalanches that formed the many dark streaks. At first it was thought that the shaking of the ground from the impact caused the dust avalanches, but if that was the case the dark streaks would have been arranged symmetrically around the impacts, rather than being concentrated into curved shapes.[26][27]

  • Minio Vallis Hanging Valleys, as seen by HiRISE. Two hanging valleys are visible, as well as many dark slope streaks.
    Minio Vallis Hanging Valleys, as seen by HiRISE. Two hanging valleys are visible, as well as many dark slope streaks.
  • Tinia Valles, as seen by HiRISE. Full size image shows dark slope streaks.
    Tinia Valles, as seen by HiRISE. Full size image shows dark slope streaks.
  • Labou Vallis, as seen by HiRISE. Ful size image shows old and new (darker) dark slope streaks.
    Labou Vallis, as seen by HiRISE. Ful size image shows old and new (darker) dark slope streaks.
  • Dark slope streaks, as seen by HiRISE under HiWish program
    Dark slope streaks, as seen by HiRISE under HiWish program
  • Dark slope streaks, as seen by HiRISE under HiWish program
    Dark slope streaks, as seen by HiRISE under HiWish program
  • Dark slope streaks, as seen by HiRISE under HiWish program
    Dark slope streaks, as seen by HiRISE under HiWish program

Fossa on Mars

Large troughs (long narrow depressions) are called fossae in the geographical language used for Mars. This term is derived from Latin; therefore fossa is singular and fossae is plural.

New York State
, is a lake that sits in a graben.

Other ideas have been suggested for the formation of fossae. There is evidence that they are associated with dikes of magma. Magma might move along, under the surface, breaking the rock and more importantly melting ice. The resulting action would cause a crack to form at the surface. Dikes caused both by tectonic stretching (extension) and by dikes are found in Iceland.[30] An example of a graben caused by a dike is shown below in the image Memnonia Fossae, as seen by HiRISE.

It appears that the water started coming out of the surface to form Mangala Vallis when a graben was formed.[4][31]

  • Graben in Memnonia Fossae, as seen by HiRISE. This graben is believed to be the result of magmatic dikes rather than regional tectonic stretching. The scale bar is 1000 meters long.
    Graben in Memnonia Fossae, as seen by HiRISE. This graben is believed to be the result of magmatic dikes rather than regional tectonic stretching. The scale bar is 1000 meters long.
  • Sirenum Fossae, as seen by HiRISE. More information can be found at Fossa (geology).
    Fossa (geology)
    .
  • Large pits in Sirenum Fossae, as seen by HiRISE under HiWish program
    Large pits in Sirenum Fossae, as seen by HiRISE under HiWish program
  • Trough cutting through an impact crater, as seen by HiRISE under HiWish program
    Trough cutting through an impact crater, as seen by HiRISE under HiWish program

Valles

There is enormous evidence that water once flowed in river valleys on Mars. Images of curved channels have been seen in images from Mars spacecraft dating back to the early 1970s with the Mariner 9 orbiter.[32][33][34][35] Vallis (plural valles) is the

Athabasca Vallis, Granicus Vallis, and Tinjar Valles) clearly begin at graben. On the other hand, some of the large outflow channels begin in rubble-filled low areas called chaos or chaotic terrain. It has been suggested that massive amounts of water were trapped under pressure beneath a thick cryosphere (layer of frozen ground), then the water was suddenly released, perhaps when the cryosphere was broken by a fault.[38][39]

  • Asopus Vallis, as seen by HiRISE
    Asopus Vallis, as seen by HiRISE
  • Samara Valles, as seen by HiRISE. Scale bar is 500 meters long.
    Samara Valles, as seen by HiRISE. Scale bar is 500 meters long.
  • Padus Vallis, as seen by THEMIS. Padus Vallis empties into the Medusae Fossae Formation.
    Padus Vallis, as seen by THEMIS. Padus Vallis empties into the Medusae Fossae Formation.
  • Close-up of Padus Vallis, as seen by THEMIS
    Close-up of Padus Vallis, as seen by THEMIS
  • Minio Vallis, as seen by THEMIS. Minio Vallis is a small river channel near the much larger Mangala Vallis.
    Mangala Vallis
    .
  • Minio Vallis, as seen by HiRISE under HiWish program. Many dark slope streaks are present.
    Minio Vallis, as seen by HiRISE under HiWish program. Many
    dark slope streaks
    are present.
  • Sabis Vallis, as seen by THEMIS. The small channels are joining to form Sabis Vallis.
    Sabis Vallis, as seen by THEMIS. The small channels are joining to form Sabis Vallis.
  • Channel showing an old oxbow and a cutoff, as seen by HiRISE under HiWish program
    Channel showing an old oxbow and a cutoff, as seen by HiRISE under HiWish program
  • Wide view of channel, as seen by HiRISE under HiWish program
    Wide view of channel, as seen by HiRISE under HiWish program
  • Channel with yardangs, as seen by HiRISE under HiWish program
    Channel with yardangs, as seen by HiRISE under HiWish program
  • Channel with dark slope streaks as seen by HiRISE under HiWish program
    Channel with
    dark slope streaks
    as seen by HiRISE under HiWish program
  • Enlargement of the previous image, as seen by HiRISE under HiWish program
    Enlargement of the previous image, as seen by HiRISE under HiWish program
  • as seen by HiRISE under HiWish program
    as seen by HiRISE under HiWish program
  • Streamlined forms in a channel, as seen by HiRISE under HiWish program
    Streamlined forms in a channel, as seen by HiRISE under HiWish program
  • Curved valley, as seen by HiRISE under HiWish program
    Curved valley, as seen by HiRISE under HiWish program

Lava flows

Lava is common on Mars, as it is on many other planetary bodies.

  • Lava flow. Lava flow stopped when it encountered the higher ground of a mound. Picture was taken with HiRISE under HiWish program.
    Lava flow. Lava flow stopped when it encountered the higher ground of a mound. Picture was taken with HiRISE under HiWish program.

Fifty Years of Mars Imaging: from Mariner 4 to HiRISE

On October 3, 2017, HiRISE acquired a picture of Mars in the Memnonia quadrangle of a spot that has been imaged by seven different cameras on different spacecraft over the past 50 years.[40] The pictures from the Red Planet started with one of the pictures from Mariner 4 in the summer of 1965. The following pictures show these pictures with their increasing resolution over the years. The resolution in the first image by Mariner 4 was 1.25 km/pixel; that compares to the approximate 50 cm/pixel resolution of HiRISE.

  • Composite demonstrating relative resolution of seven different cameras that imaged Mars:HiRISE (Mars Reconnaissance Orbiter), THEMIS VIS (Mars Odyssey), MOC-WAC (Mars Global Surveyor), HRSC (Mars Express), CTX (Mars Reconnaissance Orbiter), Viking, Mariner 4. Location is Memnonia quadrangle.
    Composite demonstrating relative resolution of seven different cameras that imaged Mars:
    Mars Odyssey), MOC-WAC (Mars Global Surveyor), HRSC (Mars Express), CTX (Mars Reconnaissance Orbiter), Viking, Mariner 4
    . Location is Memnonia quadrangle.
  • Composite demonstrating relative resolution of seven different cameras that imaged Mars: HiRISE (Mars Reconnaissance Orbiter), THEMIS VIS (Mars Odyssey), MOC-WAC (Mars Global Surveyor), HRSC (Mars Express), CTX (Mars Reconnaissance Orbiter), Viking, Mariner 4. Location is Memnonia quadrangle. Blue arrow on some pictures points to same location at with different cameras. Red box with CTX image shows location of the next frame from HiRISE.
    Composite demonstrating relative resolution of seven different cameras that imaged Mars: HiRISE (Mars Reconnaissance Orbiter), THEMIS VIS (Mars Odyssey), MOC-WAC (Mars Global Surveyor), HRSC (Mars Express), CTX (Mars Reconnaissance Orbiter), Viking, Mariner 4. Location is Memnonia quadrangle. Blue arrow on some pictures points to same location at with different cameras. Red box with CTX image shows location of the next frame from HiRISE.
  • Map showing area covered in the above photos with a black rectangle. Blue arrow indicates the spot eventually imaged by HiRISE. The relative positions of Columbus Crater, Williams Crater, Ejriksson Crater, Dejnev Crater, and Bernard Crater are shown.
    Map showing area covered in the above photos with a black rectangle. Blue arrow indicates the spot eventually imaged by HiRISE. The relative positions of
    Bernard Crater
    are shown.

More features

  • Surface features along a scarp in Medusae Fossae formation, as seen by HiRISE under HiWish program. Location is Memnonia quadrangle.
    Surface features along a scarp in Medusae Fossae formation, as seen by HiRISE under HiWish program. Location is Memnonia quadrangle.
  • Channels inside and outside of a crater, as seen by HiRISE under HiWish program. Branched channels are outside the crater (at the top of the image). The channel then goes into crater, making more branches that are probably on a delta-like form.
    Channels inside and outside of a crater, as seen by HiRISE under HiWish program. Branched channels are outside the crater (at the top of the image). The channel then goes into crater, making more branches that are probably on a delta-like form.
  • Channel that has eroded through a wrinkle ridge, as seen by HiRISE under HiWish program. Arrow shows point where channel eroded through ridge.
    Channel that has eroded through a wrinkle ridge, as seen by HiRISE under HiWish program. Arrow shows point where channel eroded through ridge.
  • Streamlined feature, as seen by HiRISE under HiWish program
    Streamlined feature, as seen by HiRISE under HiWish program
  • Wide view of layers in crater, as seen by HiRISE under HiWish program
    Wide view of layers in crater, as seen by HiRISE under HiWish program
  • Close view of layers in crater, as seen by HiRISE under HiWish program
    Close view of layers in crater, as seen by HiRISE under HiWish program
  • Close view of boulders sitting in pits, as seen by HiRISE under HiWish program
    Close view of boulders sitting in pits, as seen by HiRISE under HiWish program
  • Exhumed crater, as seen by HiRISE under HiWish program. After its formation, the crater was buried, now it is being exposed by erosion.
    Exhumed crater, as seen by HiRISE under HiWish program. After its formation, the crater was buried, now it is being exposed by erosion.

Other Mars quadrangles

Mars Quad Map
Mars Quad Map
Clickable image of the 30 cartographic quadrangles of Mars, defined by the USGS.[41][42] Quadrangle numbers (beginning with MC for "Mars Chart")[43] and names link to the corresponding articles. North is at the top; 0°N 180°W / 0°N 180°W / 0; -180 is at the far left on the equator. The map images were taken by the Mars Global Surveyor.
(
)

Interactive Mars map

Map of MarsAcheron FossaeAcidalia PlanitiaAlba MonsAmazonis PlanitiaAonia PlanitiaArabia TerraArcadia PlanitiaArgentea PlanumArgyre PlanitiaChryse PlanitiaClaritas FossaeCydonia MensaeDaedalia PlanumElysium MonsElysium PlanitiaGale craterHadriaca PateraHellas MontesHellas PlanitiaHesperia PlanumHolden craterIcaria PlanumIsidis PlanitiaJezero craterLomonosov craterLucus PlanumLycus SulciLyot craterLunae PlanumMalea PlanumMaraldi craterMareotis FossaeMareotis TempeMargaritifer TerraMie craterMilankovič craterNepenthes MensaeNereidum MontesNilosyrtis MensaeNoachis TerraOlympica FossaeOlympus MonsPlanum AustralePromethei TerraProtonilus MensaeSirenumSisyphi PlanumSolis PlanumSyria PlanumTantalus FossaeTempe TerraTerra CimmeriaTerra SabaeaTerra SirenumTharsis MontesTractus CatenaTyrrhena TerraUlysses PateraUranius PateraUtopia PlanitiaValles MarinerisVastitas BorealisXanthe Terra
The image above contains clickable links
global topography of Mars. Hover your mouse over the image to see the names of over 60 prominent geographic features, and click to link to them. Coloring of the base map indicates relative elevations, based on data from the Mars Orbiter Laser Altimeter on NASA's Mars Global Surveyor. Whites and browns indicate the highest elevations (+12 to +8 km); followed by pinks and reds (+8 to +3 km); yellow is 0 km; greens and blues are lower elevations (down to −8 km). Axes are latitude and longitude; Polar regions are noted. )


See also

References

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  2. ^ USGS Astrogeology: Planetary Map Listing
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  4. ^ a b "Mars Channels and Valleys". Msss.com. Retrieved 2012-08-04.
  5. ^ Cabrol, N. and E. Grin (eds.). 2010. Lakes on Mars. Elsevier.NY.
  6. ^ Wray, J. et al. 2009. Columbus Crater and other possible plaelakes in Terra Sirenum, Mars. Lunar and Planetary Science Conference. 40: 1896.
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  12. ^ Emrick, C. and R. De Hon. 1999. Flood discharge through Labou Vallis, Mars. Lunar Planet. Sci. Conf. XXX: Abstract #1893.
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  14. ^ De Hon, R. 1994. Lacustrine sedimentation in lower Mangals Valles. Mars Lunar Planet. Sci. Conf. XXVII: 295-296
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  16. ^
    ISBN 978-0-8165-1257-7
    . Retrieved 7 March 2011.
  17. ^ Head, J., J. Mustard. 2006. Breccia dikes and crater-related faults in impact craters on Mars: Erosion and exposure on the floor of a crater 75 km in diameter at the dichotomy boundary, Meteorit. Planet Science: 41, 1675-1690.
  18. ^ SAO/NASA ADS Astronomy Abstract Service: Yardangs on Mars
  19. ^ Schorghofer, N, et al. 2007. Three decades of slope streak activity on Mars. Icarus. 191:132-140.
  20. ^ http://www.space.com/scienceastronomy/streaks_mars_021200.html [dead link]
  21. ^ www.spcae.com https://web.archive.org/web/20150221231430/http://www.spcae.com/scienceastronomy/streaks_mars_021211.html. Archived from the original on February 21, 2015. {{cite web}}: Missing or empty |title= (help)
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  23. ^ "Mars Spirit Rover Gets Energy Boost From Cleaner Solar Panels". Sciencedaily.com. 2009-02-19. Retrieved 2012-08-04.
  24. doi:10.1029/2002GL014936
  25. ISBN 0-517-00192-6
    .
  26. doi:10.1016/j.icarus.2011.10.026
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