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Noachis Terra (; lit. "Land of
Noah Noah ''Nukh''; am, ኖህ, ''Noḥ''; ar, نُوح '; grc, Νῶε ''Nôe'' () is the tenth and last of the pre-Flood patriarchs in the traditions of Abrahamic religions. His story appears in the Hebrew Bible (Book of Genesis, chapters 5� ...
") is an extensive southern
landmass A landmass, or land mass, is a large region or area of land. The term is often used to refer to lands surrounded by an ocean or sea, such as a continent or a large island. In the field of geology, a landmass is a defined section of continen ...
(''terra'') of the
planet A planet is a large, rounded astronomical body that is neither a star nor its remnant. The best available theory of planet formation is the nebular hypothesis, which posits that an interstellar cloud collapses out of a nebula to create a you ...
Mars Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System, only being larger than Mercury. In the English language, Mars is named for the Roman god of war. Mars is a terrestrial planet with a thin at ...
. It lies west of the giant Hellas impact basin, roughly between the latitudes −20° and −80° and longitudes 30° west and 30° east, centered on . It is in the Noachis quadrangle. The term " Noachian epoch" is derived from this region.


Gallery

Dunes of Mars.jpg, A crater in Noachis Terra. The
dune A dune is a landform composed of wind- or water-driven sand. It typically takes the form of a mound, ridge, or hill. An area with dunes is called a dune system or a dune complex. A large dune complex is called a dune field, while broad, f ...
s here are linear, thought to be due to shifting
wind Wind is the natural movement of air or other gases relative to a planet's surface. Winds occur on a range of scales, from thunderstorm flows lasting tens of minutes, to local breezes generated by heating of land surfaces and lasting a few ...
directions. Image:Exhumed crater in Noachis.JPG, Crater that was buried in another age and is now being exposed by erosion, as seen by the
Mars Global Surveyor ''Mars Global Surveyor'' (MGS) was an American robotic space probe developed by NASA's Jet Propulsion Laboratory and launched November 1996. MGS was a global mapping mission that examined the entire planet, from the ionosphere down through t ...
, under the
MOC Public Targeting Program The MOC Public Targeting Program was a very popular program that followed the Mars Global Surveyor's pictures of Mars. A total of 4,636 requests came in from the general public. Of these, 1,086 were photographed by the Mars Observer Camera. Many ...
. Image:24396floor.jpg, Floor of crater in Noachis quadrangle, as seen by HiRISE under
HiWish program HiWish is a program created by NASA so that anyone can suggest a place for the HiRISE camera on the Mars Reconnaissance Orbiter to photograph. It was started in January 2010. In the first few months of the program 3000 people signed up to use HiRIS ...
. ESP 035632 1490noachiscraterfloor.jpg, Erosion forms on floor of crater, as seen by HiRISE under HiWish program WikidarkdunesS0101212context.jpg, Context for image of dark dunes in next image. Picture taken with Mars Global surveyor under
MOC Public Targeting Program The MOC Public Targeting Program was a very popular program that followed the Mars Global Surveyor's pictures of Mars. A total of 4,636 requests came in from the general public. Of these, 1,086 were photographed by the Mars Observer Camera. Many ...
. Image:Dark dunes in Noachis.JPG, Dark dunes (probably
basalt Basalt (; ) is an aphanitic (fine-grained) extrusive igneous rock formed from the rapid cooling of low-viscosity lava rich in magnesium and iron (mafic lava) exposed at or very near the surface of a rocky planet or moon. More than 90 ...
), in an intracrater dune field, Noachis. Picture from Mars Global Surveyor, under the MOC Public Targeting Program. ESP 040974 1395gullies.jpg, Wide view of gullies in
Arkhangelsky Crater Arkhangelsky (masculine), Arkhangelskaya (feminine), or Arkhangelskoye (neuter) may refer to: People * Arkhangelsky (surname) Places * Arkhangelsky District, a district in the Republic of Bashkortostan, Russia * Arkhangelsky (rural locality) (''Ar ...
, as seen by HiRISE under HiWish program 40974 1395gullies.jpg, Close-up of small channels in gullies in
Arkhangelsky Crater Arkhangelsky (masculine), Arkhangelskaya (feminine), or Arkhangelskoye (neuter) may refer to: People * Arkhangelsky (surname) Places * Arkhangelsky District, a district in the Republic of Bashkortostan, Russia * Arkhangelsky (rural locality) (''Ar ...
, as seen by HiRISE under HiWish program Patterned ground in the shape of polygons can be seen to the right. Note: this is an enlargement of the previous image from Arkhangelsky Crater. 40974 1395gully.jpg, Close-up of a gully showing a channel going across the apron, as seen by HiRISE under HiWish program. Note: this is an enlargement of a previous image from Arkhangelsky Crater.


Gullies on dunes

Gullies are found on some dunes. These are somewhat different from gullies in other places, like the walls of craters. Gullies on dunes seem to keep the same width for a long distance and often just end with a pit, instead of an apron. Many of these gullies are found on dunes in the Russel crater. ESP 020217 1255dunechannels.jpg, Wide view of dunes in Russell Crater, as seen by HiRISE Many narrow gullies are visible. 20217 1255dunechannelsclose.jpg, Close view of the end of gullies in Russell Crater, as seen by HiRISE Note: These type of gullies do not usually end with an apron. The location is Noachis quadrangle. 20217 1255dunechannelsclosetop.jpg, Close view of the end of gullies in Russell Crater, as seen by HiRISE ESP 020217 1255dunesclosecolor.jpg, Close, color view of the end of gullies in Russell Crater, as seen by HiRISE


Interactive Mars map


Further reading

* Lorenz, R. 2014. The Dune Whisperers. The Planetary Report: 34, 1, 8-14 * Lorenz, R., J. Zimbelman. 2014. Dune Worlds: How Windblown Sand Shapes Planetary Landscapes. Springer Praxis Books / Geophysical Sciences. * Ruj, T., Komatsu, G., Dohm, J.M., Miyamoto, H. and Salese, F., 2017. Generic identification and classification of morphostructures in the Noachis-Sabaea region, southern highlands of Mars. Journal of Maps, 13(2), pp. 755–766. DOI: 10.1080/17445647.2017.1379913. * Ruj, T., Komatsu, G., Pasckert, J.H. and Dohm, J.M., 2018. Timings of early crustal activity in southern highlands of Mars: Periods of crustal stretching and shortening. Geoscience Frontiers.


External links

* {{in lang, en}
ESA Science and Technology: Noachis Terra
Noachis quadrangle