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In astrogeology, chaos terrain (or chaotic terrain) is a planetary surface area where features such as ridges, cracks, and plains appear jumbled and enmeshed with one another. Chaos terrain is a notable feature of the planet Mars, Mercury, Jupiter's moon Europa, and the dwarf planet Pluto. In scientific nomenclature, "chaos" is used as a component of proper nouns (e.g., "Aureum Chaos" on Mars).〔Robert Roy Britt, "(Chaos on Mars )," Space.com〕 == On Mars == (詳細はMargaritifer Sinus quadrangle with major features labeled. Aureum Chaos is near the top of the map. Image:Canyons and Mesas of Aureum Chaos in Oxia Palus.JPG|Huge canyons in Aureum Chaos, as seen by THEMIS. Gullies are rare at this latitude. Image from Margaritifer Sinus quadrangle. Image:Iani Chaos.JPG|Iani Chaos, as seen by THEMIS. Sand from eroding mesas is covering brighter floor material. Click on image to see relationship of Iani Chaos to other local features. Image from Margaritifer Sinus quadrangle. File:Quadrângulo de Oxia Palus.JPG|Quadrangle map of Oxia Palus quadrangle labeled with major features. This quadrangle contains many collapsed areas of Chaos and many outflow channels (old river valleys). Image:Erosion in Aram Chaos.JPG|Erosion in Aram Chaos, as seen by THEMIS. Image in Oxia Palus quadrangle. Image:Blocks in Aram.JPG|Blocks in Aram showing possible source of water, as seen by THEMIS. Image in Oxia Palus quadrangle. Image:Hydraotes Chaos.JPG|Hydraotes Chaos, as seen by HiRISE. Click on image to see channels and layers. Scale bar is 1000 meters long. Image in Oxia Palus quadrangle. Image:Hydaspis Chaos.JPG|Hydaspis Chaos, as seen by HiRISE. Image in Oxia Palus quadrangle. Image:Eos Chaos.jpg|Light colored layers in Eos Chaos, as seen by HiRISE. Image is in Oxia Palus quadrangle. Image in Coprates quadrangle. Image:Phaethontis.JPG|Map of Phaethontis quadrangle. Click on to enlarge and see some crater names. Gorgonum Chaos is near the top of map. Image:Gorgonum in Phaethontis.JPG|Gorgonum Chaos as seen by Mars Reconnaissance Orbiter HiRISE. Image is 4 km wide. Image in Phaethontis quadrangle. Image:Atlantis Chaos.JPG|Atlantis Chaos, as seen by HiRISE. Click on image to see mantle covering and possible gullies. The two images are different parts of the original image. They have different scales. Image in Phaethontis quadrangle. Image:Ister Chaos.jpg|Ister Chaos, as seen by HiRISE. Location is the Lunae Palus quadrangle. Image:Ister Chaos Close-up.JPG|Close-up of Ister Chaos, as seen by HiRISE. Location is the Lunae Palus quadrangle. ESP 042939 1795chaos.jpg|Chaos terrain, as seen by HiRISE under HiWish program Location is Margaritifer Sinus quadrangle On April 1, 2010, NASA released the first images under the HiWish program in which just plain folk suggested places for HiRISE to photograph. One of the eight locations was Aureum Chaos.〔http://uahirise.org/releases/hiwish-captions.php〕 The first image below gives a wide view of the area. The next two images are from the HiRISE image.〔http://hirise.lpl.arizona.edu/ESP_016869_1775〕 Image:Aureum Chaos wide context.JPG|THEMIS image of wide view of following HiRISE images. Black box shows approximate location of HiRISE images. This image is just a part of the vast area known as Aureum Chaos. Click on image to see more details. Image:Aureum Chaos wide view.JPG|Aureum Chaos, as seen by HiRISE, under the HiWish program. Image:Aureum Chaos HiWish.JPG|Close up view of previous image, as seen by HiRISE under HiWish program. Small round dots are boulders. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「chaos terrain」の詳細全文を読む スポンサード リンク
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<BR><gallery><BR>Wikichaosmap.jpg|Tography map of Oxia Palus region of Mars showing the location of a number of chaos regions<BR>Image:Margaritifer Sinus Map.JPG|Map of <A HREF=){kind=link}