图中所见是火星勘测轨道器(MRO)的仪器HiRISE所拍的高解像图片，拍摄的地区是火星的阿伦沌地(Aram Chaos)，阿伦沌地是连接战神谷(Ares Vallis)渠道的陨石坑，因为地貌似混沌断裂的大地，因此称为沌地(Chaos)，大型的断裂可能是由地底物质的迁移所造成。在阿伦沌地的峭壁上，能探测到硫酸盐(sulfates)与赤铁矿(hematite)的存在，而硫酸盐与赤铁矿均可能是湖中长时间的沉淀而形成
Caption:: This image is from Aram Chaos on Mars, a large crater connected to the Ares Vallis outflow channel. It is called "chaos" because of the rough floor topography, large slumped blocks and large fractures that may have been caused by removal of subsurface material. Sulfates have been detected in the cliff walls in some areas within Aram Chaos, as well as hematite. It has been suggested that these materials were deposited within a lake setting
来源:NASA/JPL/University of Arizona
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