fossil soils

例句：

1. 1.The team spent several months excavating fossil soils in the cave.
   该团队花了数月时间在洞穴中挖掘化石土壤。
2. 2. Fossil soils are often rich in minerals and nutrients that can be used for agriculture.
   化石土壤通常富含矿物质和养分，可用于农业。
3. 3. Paleosols are formed by the decomposition of ancient plant and animal remains.
   古土壤是由古代植物和动物遗骸的分解形成的。