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Olympica Fossae : ウィキペディア英語版 | Olympica Fossae
Olympica Fossae is a trough in the Tharsis quadrangle of Mars at 25° north latitude and 114.1° west longitude. It is about 420 km long and was named after an albedo feature at 17N, 134W.〔http://planetarynames.wr.usgs.gov〕 Parts of the Fossae have been suggested to be both outflow channels as well as channels for flowing lava, routing both molten rock and catastrophic outburst floods of water at different times in Mars' geological past.〔Carr, M.H. (2006), The Surface of Mars. Cambridge Planetary Science Series, Cambridge University Press.〕 == Fossa == Olympica Fossae is a large set of troughs, called fossae in the geographical language used for Mars. Troughs form when the crust is stretched until it breaks along two subparallel failure planes, or faults. The middle section between the faults moves down, forming the trough and leaving steep cliffs along the sides. Sometimes, a line of pits form as material collapse into a void that forms from the stretching. Such fault-bounded geological structures are also called graben.〔http://www.msss.com/mars_images/moc/2004/01/29/index.html〕
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「Olympica Fossae」の詳細全文を読む
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