岩石记述学

例句：

1. 1. The geologist is studying the rocks in the area.
   地质学家正在研究该地区的岩石。
2. 2. The paleontologist has discovered a new species of fossils from the rock layers.
   古生物学家在岩石层中发现了一种新的化石物种。
3. 3. The archaeologist is excavating ancient ruins to learn more about the history of the region.
   考古学家正在挖掘古代遗迹，以了解该地区的历史。