chemical deposit

例句：

1. 1.The chemical deposits in the river are a result of the mineralization process.
   河流中的化学沉积物是矿物质化过程的结果。
2. 2. The study of these deposits can provide valuable insights into the history of the region.
   对这些沉积物的研究表明，可以提供该地区历史的宝贵见解。
3. 3.The chemical deposits in the area have been found to contain trace amounts of mercury and lead.
   该地区的化学沉积物被发现含有微量的汞和铅。