silicified

例句：

1. 1. The rocks in the area have been extensively silicified over millions of years.
   该地区的岩石经过数百万年的广泛硅化。
2. 2. The mineral is a common component of many types of rocks, including those with a high content of silicon.
   这种矿物是许多类型岩石的常见成分，包括那些含硅量较高的岩石。
3. 3.The process of silicification can be observed in the formation of fossils from ancient marine organisms.
   硅化过程可以在古代海洋生物化石的形成中观察到。