In the image entitled "Russell Crater Dunes" for example the entire bottom 3rd of the image is dunes. That's the dark raised ridges. Remember you are looking directly down on them.



I don't know, I'm not a geologist sadly. I wish I knew more about the subject.

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The channels at the top of this VIS image are dissecting the northern rim of Cerulli Crater.

Source: THEMIS - Mars Odyssey Mission

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These small, dark dunes are located in Hellas Basin, within a region of chaotic terrain.

Source: THEMIS - Mars Odyssey Mission

post 453 looks like a great place to set up a dune surfing bussiness. I wonder if there are any of those really large worms under there? Great post Wasp. DONTEATUS

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The channels in this image were likely carved by flowing lavas from Elysium Mons.

Source: THEMIS - Mars Odyssey Mission

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This VIS image is located east of the major fracture system of Tempe Terra. The small ridges intersect to form polygons.

Source: THEMIS - Mars Odyssey Mission

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These sand dunes are located on the floor of a very degraded crater in Terra Cimmeria.

Source: THEMIS - Mars Odyssey Mission

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This interesting image shows a small portion of the western floor of Hellas Basin. The curved, broad ridges are separated by lower elevations filled with smaller, linear ridges.

Source: THEMIS - Mars Odyssey Mission

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The crater just out of frame to the left in this image is located on the floor of Schiaparelli Crater. Within the lows of the ejecta blanket of the small crater are old, linear dunes. These dunes do not appear to be active at this time.

Source: THEMIS - Mars Odyssey Mission

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The small, linear ridges in this image are located on the floor of an unnamed crater in Noachis Terra.

Source: THEMIS - Mars Odyssey Mission

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This crater and it's dune field are located in southern Noachis Terra.

Source: THEMIS - Mars Odyssey Mission

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This VIS image shows a deep channel between two unnamed craters in Xanthe Terra. A fan/delta has formed at the lower end of the channel where material from the higher elevation crater has moved through the channel to the lower elevation crater.

Source: THEMIS - Mars Odyssey Mission

What is interesting on this photo, that two big stones have definite criss-cross lines on them, like on a criss-cross bun. May be, this stones formed in similar way, kind of like dough rising in the oven, out of lava coming up, with its outer layers drying up faster. Then cracks formed.

Not this photo above! Another picture. Where did it go?

What is interesting on this photo, that two big stones have definite criss-cross lines on them, like on a criss-cross bun. May be, this stones formed in similar way, kind of like dough rising in the oven, out of lava coming up, with its outer layers drying up faster. Then cracks formed.

What is interesting on this photo, that two big stones have definite criss-cross lines on them, like on a criss-cross bun. May be, this stones formed in similar way, kind of like dough rising in the oven, out of lava coming up, with its outer layers drying up faster. Then cracks formed.

waspie these are so intresting that you can sit for hours and think what it will be like to walk on the surface there someday.Keep them coming.Space is really Big! I mean Big! DONTEATUS Guess what my co,name is in Dallas ?

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This landslide is located in an unnamed crater in Terra Sirenum.

Source: THEMIS - Mars Odyssey Mission

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These individual, dark dunes are located on the plains to the west of Hellas Basin. Other wind derived features are visible at the bottom of the frame.

Source: THEMIS - Mars Odyssey Mission

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Dark slope streaks mark the interior rim of this unnamed crater in Terra Sabaea.

Source: THEMIS - Mars Odyssey Mission

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Tracing the downward motion of dust, dark streaks are present on the interior rim of this unusual crater within Tikhonravov Crater.

Source: THEMIS - Mars Odyssey Mission

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Linear dunes and narrow ridges are found near the channel of Huo Hsing Vallis - which runs from the bottom to the top of this VIS image.

Source: THEMIS - Mars Odyssey Mission

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The lava flows in this VIS image originated at Arsia Mons, one of the large Tharsis volcanoes.

Source: THEMIS - Mars Odyssey Mission

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This group of landslides is located within Noctis Labyrinthus.

Source: THEMIS - Mars Odyssey Mission

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This area of channels is located on the eastern rim region of the Hellas Basin.

Source: THEMIS - Mars Odyssey Mission

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These individual dunes form a dune field on the floor of Arkhangelsky Crater.

Source: THEMIS - Mars Odyssey Mission

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This VIS image shows the northern wall of Melas Chasma near Ophir Labes. Note the landslide deposits on the bottom right side of the image.

Source: THEMIS - Mars Odyssey Mission

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The channels in this VIS image are located on the floor of Newton Crater.

Source: THEMIS - Mars Odyssey Mission

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This VIS image of Coprates Chasma contains a landslide deposit and multiple dunes.

Source: THEMIS - Mars Odyssey Mission

wierd

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The linear depressions in this VIS image were created by fault action. These features are located on the western margin of the Elysium Volcanic Complex.

Source: THEMIS - Mars Odyssey Mission

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This group of landslide deposits is located in the lows between Aeolis Mensae and Aeolis Planum. Note the wind eroded surface at the bottom of the frame.

Source: THEMIS - Mars Odyssey Mission

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The interior rim of this unnamed crater in Terra Cimmeria is dissected by numerous channels.

Source: THEMIS - Mars Odyssey Mission

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This VIS image shows a landslide deposit on the northern rim of Montevallo Crater.

Source: THEMIS - Mars Odyssey Mission

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It is not uncommon for multiple pieces of a meteor to impact Mars close together at the same time. When this happens, the craters that are formed overlap and the force of the impacts results in a linear wall separating the side-by-side form-at-the-same-time craters. This image shows where three craters were created simultaneously.

Source: THEMIS - Mars Odyssey Mission

k whats the deal with those things?.. seen them a few times now- pretty interesting

I'm not totally sure what you mean by "what's the deal"? I assume you are talking about the dunes. Mars is a planet covered in sand and with high winds, dunes are hardly unexpected.

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A landslide deposit is visible in this image of an unnamed crater in Terra Cimmeria.

Source: THEMIS - Mars Odyssey Mission

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Granicus Valles originates from fracture systems of the Elysium Volcanic Complex. This channel system was likely produced by volcanic flows.

Source: THEMIS - Mars Odyssey Mission

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This interesting surface texture is located in Elysium Planitia. The upper layer appears to have a linear pattern eroded into the material.

Source: THEMIS - Mars Odyssey Mission

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Intersecting ridges create an unusual surface in this region of Noachis Terra.

Source: THEMIS - Mars Odyssey Mission

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Individual dunes comprise this dune field located on the floor of Herschel Crater.

Source: THEMIS - Mars Odyssey Mission

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A field of sand dunes in located on the floor of this unnamed crater in Noachis Terra. Uzboi Valles runs along the western rim of this crater.

Source: THEMIS - Mars Odyssey Mission

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Sand dunes are located on the floor of this unnamed crater in Terra Cimmeria.

Source: THEMIS - Mars Odyssey Mission

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This group of landslide deposits is located in an unnamed crater in Noachis Terra.

Source: THEMIS - Mars Odyssey Mission

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This landslide deposit is located on the northern side of Sharonov Crater, which has been modified by the flows within Kasei and Lobo Valles.

Source: THEMIS - Mars Odyssey Mission

Waspie,

Are these flows due to quakes, fine dust or water?
Seems there are a lot of similarities on Mars and Earth.

I really don't know. I'm not sure how fine dust can cause a landslide. There is no liquid water on the surface of Mars but it is possible that the action of ice/dry ice could trigger land slides. As Mars was once heavily volcanico it would seem likely to me that there will still be sone seismic activity so I'm guessing that quakes would be a contributing factor.


You make this same statement regularly. There are a lot of similarities between Venus and Earth and between the Moon and Earth. There are also huge differences, so in itself this statement means very little.