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Marte Vallis is a valley in the Amazonis quadrangle of Mars, located at 15 North and 176.5 West. It is 185 km long and was named for the Spanish word for "Mars".〔http://planetarynames.wr.usgs.gov/〕 It has been identified as an outflow channel, carved in the geological past by catastrophic release of water from aquifers beneath the Martian surface.〔Carr, M.H. (2006), The Surface of Mars. Cambridge Planetary Science Series, Cambridge University Press.〕 Marte Vallis is the site of the first discovery of columnar jointing on Mars. 〔Milazzo, M.P., Keszthelyi, L.P., Jaeger, W.L. Rosiek, M., Mattson, S., Verba, C., Beyer, R.A., Geissler, P.E., McEwen, A.S., and the HiRISE Team. (2009) Discovery of columnar jointing on Mars. Geology. 37(2), 171–174. (Abstract )〕 File:Marte Vallis Island.JPG|Streamlined Island in Marte Vallis, as seen by HiRISE. The enlarged image gives a good view of dark slope streaks. Island is just to the west of Pettit Crater. Scale bar is 500 meters long. Image:Columnar Jointing in Yellowstone.JPG|Columinar Jointing in Yellowstone National Park. Image:Giants-causeway-in-ireland.jpg|Columnar jointing in the basalt of the Giant's Causeway in Ireland == 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「Marte Vallis」の詳細全文を読む スポンサード リンク
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