Reull Vallis is a valley on
Mars
Mars is the fourth planet from the Sun. It is also known as the "Red Planet", because of its orange-red appearance. Mars is a desert-like rocky planet with a tenuous carbon dioxide () atmosphere. At the average surface level the atmosph ...
that appears to have been carved by water. It runs westward into
Hellas Planitia
Hellas Planitia is a plain located within the huge, roughly circular impact basin Hellas located in the southern hemisphere of the planet Mars. Hellas is the fourth- or fifth-largest known impact crater in the Solar System. The basin floor ...
. It is named after the
Gaelic
Gaelic (pronounced for Irish Gaelic and for Scots Gaelic) is an adjective that means "pertaining to the Gaels". It may refer to:
Languages
* Gaelic languages or Goidelic languages, a linguistic group that is one of the two branches of the Insul ...
word for
planet
A planet is a large, Hydrostatic equilibrium, rounded Astronomical object, astronomical body that is generally required to be in orbit around a star, stellar remnant, or brown dwarf, and is not one itself. The Solar System has eight planets b ...
. It is found in the
Hellas quadrangle
The Hellas quadrangle is one of a series of 30 quadrangle maps of Mars used by the United States Geological Survey (USGS) Astrogeology Research Program. The Hellas quadrangle is also referred to as MC-28 (Mars Chart-28).
The Hellas quadrangle ...
.
Lineated Floor Deposits
On the floors of some channels are features called lineated floor deposits. They are ridged and grooved materials that seem to deflect around obstacles. They are believed to be ice-rich. Some glaciers on the Earth show such features. Lineated floor deposits may be related to
lobate debris apron
Lobate debris aprons (LDAs) are geological features on Mars, first seen by the Viking Orbiters, consisting of piles of rock debris below cliffs. These features have a convex topography and a gentle slope from cliffs or escarpments, which suggest fl ...
s, which have been proven to contain large amounts of ice. Reull Vallis, as pictured below, displays these deposits.
[http://themis.asu.edu.zoom-20070716a]
Gallery
Image:Reull Vallis.JPG, Drainage features in Reull Vallis, as seen by THEMIS
In Greek mythology and religion, Themis (; ) is the goddess and personification of justice, divine order, law, and custom. She is one of the twelve Titan children of Gaia and Uranus, and the second wife of Zeus. She is associated with oracles a ...
. Click on image to see relationship of Reull Vallis to other features.
File:Reull Vallis lineated deposits.jpg, Reull Vallis with lineated floor deposits, as seen by THEMIS
In Greek mythology and religion, Themis (; ) is the goddess and personification of justice, divine order, law, and custom. She is one of the twelve Titan children of Gaia and Uranus, and the second wife of Zeus. She is associated with oracles a ...
. Click on image to see relationship to other features.
Image:Reull Vallisl layers.JPG, Layers in Reull Vallis, as seen by THEMIS
In Greek mythology and religion, Themis (; ) is the goddess and personification of justice, divine order, law, and custom. She is one of the twelve Titan children of Gaia and Uranus, and the second wife of Zeus. She is associated with oracles a ...
.
Image:Fretted terrain near ReullVallis.jpg, Fretted terrain
Fretted terrain is a type of surface feature common to certain areas of Mars and was discovered in Mariner 9 images. It lies between two different types of terrain. The surface of Mars can be divided Martian dichotomy, into two parts: low, young, ...
near Reull Vallis, as seen by HiRISE
High Resolution Imaging Science Experiment is a camera on board the '' Mars Reconnaissance Orbiter'' which has been orbiting and studying Mars since 2006. The 65 kg (143 lb), US$40 million instrument was built under the direction ...
.
Image:Close-up of Fretted Terrain near Reull Vallis.JPG, Close-up of fretted terrain
Fretted terrain is a type of surface feature common to certain areas of Mars and was discovered in Mariner 9 images. It lies between two different types of terrain. The surface of Mars can be divided Martian dichotomy, into two parts: low, young, ...
near Reull Vallis, as seen by HiRISE. This area would be a challenge to walk across.
Image:Layers in Monument Valley.jpg, Layers in Monument Valley, Utah. 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.
See also
*
Dao Vallis
*
Harmakhis Vallis
References
External links
Google Mars map centred on Reull VallisGeologic Map of Reull Vallis Region of Mars by Astrogeology Science Center, U.S. Geological Survey
Valleys and canyons on Mars
Hellas quadrangle
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