The elements are contained in layers of mud ranging in thickness from 2 meters to 70 meters that have accumulated on seabeds 3, 500 meters to 6, 000 meters deep.
在3500至6000米深的海床上，蓄积着2到70米厚的海底淤泥层，稀土元素就储藏这些泥层里。
Such geological disasters destroyed forests and vegetation accumulated massive loose debris layer, which also can lead to large-scale mud-rock flows after the rains.
由地震所引发的次生地质灾害毁坏了森林和植被，堆积了大量松散的碎屑层，这也为地震后降雨诱发泥石流和滑坡提供了丰富的物质来源。
Such geological disasters destroyed forests and vegetation accumulated massive loose debris layer, which also can lead to large-scale mud-rock flows after the rains.
由地震所引发的次生地质灾害毁坏了森林和植被，堆积了大量松散的碎屑层，这也为地震后降雨诱发泥石流和滑坡提供了丰富的物质来源。
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