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全球18处极端环境:西藏塞莫拉公路海拔超6千米(17)

2010-06-24 08:49:16 中华网论坛

    17.地球上最厚的冰层

全球18处极端环境:西藏塞莫拉公路海拔超6千米

地球上最厚的冰层

    南极洲的本特利冰河下沟谷(Bentley Subglacial Trench)因其厚厚的冰层而闻名,冰层厚度达8383英尺(约合2555米)。它是地球上没有被海洋覆盖的最低点。但是,地球上最低点的头衔仍归属死海,因为从技术角度讲,死海是在陆地之上,本特利冰河下沟谷则覆盖了水冰,其面积与墨西哥国土面积相当。

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