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Claritas Fossae is a group of troughs in the Phoenicis Lacus and Thaumasia quadrangles of Mars, located at 31.5 S and 104.1 W. The structure is 2,050.0 km long and was named after a classical albedo feature name.〔http://planetarynames.wr.usgs.gov〕 Long narrow depressions on Mars are called fossae. This term is derived from Latin; therefore fossa is singular and fossae is plural.〔http://www.marsartgallery.com/marsnames.html〕 Troughs form when the crust is stretched until it breaks. The stretching can be due to the large weight of a nearby volcano. Fossae/pit craters are common near volcanoes in the Tharsis and Elysium regions.〔Skinner, J., L. Skinner, and J. Kargel. 2007. Re-assessment of Hydrovolcanism-based Resurfacing within the Galaxias Fossae Region of Mars. Lunar and Planetary Science XXXVIII (2007)〕 A trough often has two breaks with a middle section moving down, leaving steep cliffs along the sides; such a trough is called a graben.〔http://hirise.lpl.arizona.edu/PSP_008641_2105〕 ==See also== * Fossa (geology) * Geology of Mars 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「Claritas Fossae」の詳細全文を読む スポンサード リンク
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