冲积矿

例句：

1. 1. The alluvial deposits in the riverbed are rich in minerals.
   河床上的冲积矿床富含矿物。
2. 2. Colluvium is a type of sedimentary rock formed by the deposition of soil and other materials.
   冲积土是一种由土壤和其他材料沉积形成的沉积岩类型。
3. 3. The colluvium has been used for centuries as a building material.
   冲积土被用作数百年来的建筑材料。