The study of recent fault activity in bedrock area, where no young sediments can be observed, is often fulfilled through the study of fault zone materials.
在缺乏新沉积层的基岩区研究断层新活动的时代，往往通过测定断层物质的年龄来进行。
The remaining portion of the dam adjacent to the damaged area also experienced high accelerations and separated from its foundation bedrock.
与大坝受损位置相邻的其他部分也同样受到高加速冲击，脱离了地基的岩体。
Arsenic is a natural substance in the pyrite bedrock underlying most of the ground area in West Bengal.
砷是西部孟加拉国的黄铁矿石层具有的天然元素之一。
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