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地球有几大板块
更新时间: 2020-07-14 00:00:00  

地球有六大板块,即亚欧板块、美洲板块、非洲板块、太平洋板块、印度洋板块和南极洲板块。各大板块是不断移动的,板块内部地壳比较稳定,板块与板块的交界处地壳比较活跃。板块运动结果是:地壳受挤压形成山脉和谷底,地壳受拉张形成裂谷。挤压和拉张使地壳上升或下降,从而引起海陆变迁。

关键词: 地球 板块

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