nappe structure

例句：

1. 1. The geologist is studying the nappe structure of the mountain range.
   地质学家正在研究山脉的岩层结构。
2. 2.The rock layers in the nappe structure are very different from each other.
   岩层结构中的岩石层彼此非常不同。
3. 3.The study of nappe structures has important implications for understanding plate tectonics.
   对岩层结构的研究对于理解板块构造学具有重要意义。