最新火星高清照片 “指纹”地形引关注(组图)(5)
图5:接近火星赤道的梅拉斯裂谷暗示着曾有液态水冲刷火星表面
火星表面也存在着巨大的构造力,如图3所示,火星表面存在一个暗色的鳄鱼外形斑块,形成于一个叫做尤利西斯窝沟(Ulysses Fossae)的深沟槽。此类地形的形成源自地壳被延伸分解,这是由于附近火山较大重量所造成的。该地形位于塔尔西斯四角区域,这里有包括奥林匹斯火山在内的多个火星最高火山,奥林匹斯火山高度为16.7英里,其高度为珠穆朗玛峰高度的3倍。
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