diluvial clay

例句：

1. 1. The diluvial deposits of the region are well-preserved.
   该地区的沉积物保存完好。
2. 2. The geologist is studying the diluvial layers in the area.
   地质学家正在研究该地区的沉积层。
3. 3. The diluvial processes have shaped the landscape over millions of years.
   数百万年来，沉积过程塑造了地貌。