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From Wikipedia, the free encyclopedia

Aram Chaos is the circular depression in the top left. Iani Chaos is in the bottom right.
Aram Chaos is the circular depression in the top left. Iani Chaos is in the bottom right.

Iani Chaos is a region of chaos terrain at the south end of the outflow channel Ares Vallis, of the Margaritifer Sinus quadrangle (MC-19) region of the planet Mars, centered at approximately ~342°E, 2°S. This is the source region of Ares Vallis. The chaotic terrain is widely believed to have formed via the removal of subsurface water or ice, resulting in flooding at the surface, and the formation of Ares Vallis. Within Iani Chaos, deposited stratigraphically above the chaotic terrain, are smooth, low-slope, intermediate-to-light-toned deposits that are rich in a hydrated mineral that is most likely gypsum as well as hematite.[1]

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Mars Science Laboratory

Several sites in the Margaritifer Sinus quadrangle have been proposed as areas to send NASA's next major Mars rover, the Mars Science Lab. Among the top 33 landing sites was Iani Chaos. A picture below shows a potential landing zone in Iani Chaos. Deposits of hematite and gypsum have been found there.[2] Those minerals are usually formed in connection with water.

The aim of the Mars Science Laboratory is to search for signs of ancient life. It is hoped that a later mission could then return samples from sites identified as probably containing remains of life. To safely bring the craft down, a 12-mile-wide, smooth, flat circle is needed. Geologists hope to examine places where water once ponded.[2] They would like to examine sediment layers.

See also


  1. ^ T.D. Glotch. "Iani Chaos as a landing site for the Mars Science Laboratory" (PDF). NASA. Retrieved 2013-05-28. Cite web requires |website= (help)
  2. ^ a b "The Floods of Iani Chaos". Mars Odyssey Mission THEMIS, Arizona State University. Retrieved 2013-05-28. Cite web requires |website= (help)

External links

This page was last edited on 29 August 2019, at 00:31
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