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Lethe Vallis : ウィキペディア英語版 | Lethe Vallis
Lethe Vallis is a valley in the Elysium quadrangle of Mars, located at 4° North and 206.5° West. It is 225 km long and is named after a river in Katmai National Monument, Alaska, USA.〔http://planetarynames.wr.usgs.gov/〕 Lethe Vallis originates at the SE margin of the West Elysium Basin. West Elysium Basin probably contained a lake that was 500 km across and received water from Athabasca Vallis. It was probably formed in just days or weeks and had a discharge about like the Mississippi. Some have suggested it was formed from lava flows, but lava would not be able to flow over such a low gradient for so long a distance.〔Balme, M., A. Bargery, C. Gallagher, S. Gupta (eds). 2011. Martian Geomorphlogy. Geological Society Pub House〕 ==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「Lethe Vallis」の詳細全文を読む
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