loess deposit

例句：

1. 1. The study of loessdeposits is crucial for understanding the geological history of the region.
   研究黄土沉积物对于理解该地区的地质历史至关重要。
2. 2. Loess deposits are a majorsource of soil in many parts of China.
   在中国许多地区，黄土沉积物是土壤的主要来源。
3. 3. The loess deposits in the area have been identified asbeing of glacial origin.
   该地区的黄土沉积物被确定为冰川起源。