outwash deposit

例句：

1. 1.The outwash deposits are rich in minerals and have been used for centuries as building materials.
   外冲积沉积物富含矿物质，被用作数百年的建筑材料。
2. 2.The geologists found the outwash deposits to be a valuable resource for studying ancient river systems.
   地质学家发现外冲积沉积物是研究古代河流系统的一个宝贵资源。
3. 3. The outwash deposits provide evidence of past climate changes.
   外冲积沉积物提供了过去气候变化的证明。