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被动大陆边缘

名词解释题
2021-09-18 04:12
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板块理论划分的构造单元之一,又称稳定大陆边缘或大西洋型大陆边缘。被动大陆边缘是地壳从洋壳向陆壳过渡的过渡壳。被动大陆边缘与活动大陆边缘相比较仅见大陆斜坡,未见火山岛弧和海沟的存在,也未出现洋壳俯冲和消减现象。这里的作用主要是沉积作用,形成的沉积岩系呈透镜状体,朝大陆和大洋方向尖灭,在陆坡、陆隆部位最厚,宽以一、二十公里至数百公里。


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被动大陆边缘的沉积物主要是
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翻译:With Average or With Particular Average(WA or WPA)()
稳定型大陆边缘由大陆架、大陆坡折和大陆隆组成。
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