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Juventae Chasma is an enormous box canyon (250 km × 100 km) on Mars which opens to the north and forms the outflow channel Maja Valles.〔(PIA03818: Floor of Juventae Chasma )〕 Juventae Chasma is located north of Valles Marineris in the Coprates quadrangle and cuts more than 5 km into the plains of Lunae Planum. The floor of Juventae Chasma is partly covered by sand dunes. There is also a 2.5 km high mountain inside Juventae, 59 km long and 23 km wide, that was confirmed by Mars Express to be composed of sulfate deposits.〔(Sulphate deposits in Juventae Chasma )〕 MRO discovered sulfates, hydrated sulfates, and iron oxides in Juventae Chasma.〔Murchie, S. et al. 2009. A synthesis of Martian aqueous mineralogy after 1 Mars year of observations from the Mars Reconnaissance Orbiter. Journal of Geophysical Research: 114.〕 Juventae Chasma has four bright mounds or light-toned interior layered deposits (IlD's), as they are often called. Researchers have found that monohydrated sulfates were first deposited on the floor. And then polyhydrated sulfates were laid down. Kieserite, a magnesium sulfate, was also found in Juventae Chasma.〔Noel, A., J. Bishop, M. Al-Samir, C. Gross, J. Flahaut, P. McGuire, C. Weitz, F. Seelos, S. Murchie. 2015. Mineralogy, morphology and stratigraphy of the light-toned interior layered deposits at Juventae Chasma. Icarus: 251, 315–331〕 Image:Juventae Chasma.jpg|Light toned sedimentary outcrops on the floor of Juventae Chasma. Image:Juventae Chasma Troughs.JPG|Juventae Chasma Troughs, as seen by HiRISE. Image:Inverted Streams in Juventae Chasma.jpg|Inverted Streams near Juventae Chasma, as seen by Mars Global Surveyor. These streams begin at the top of a ridge then run together. Image:Juventae Chasma Inverted Channels.JPG|Inverted Channels near Juventae Chasma, as seen by HiRISE. Channels were once regular stream channels. Scale bar is 500 meters long. Image:Juventae Chasma Layers.JPG|Layers west of Juventae Chasma, as seen by HiRISE. Scale bar is 500 meters long. Image:Plateau near Juventae Chasma.jpg|Plateau near Juventae Chasma. ==References== 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「Juventae Chasma」の詳細全文を読む スポンサード リンク
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