地层学

例句：

1. 1. Geologists study the earth's layers to understand its history.
   地质学家研究地球的层次以了解其历史。
2. 2. The stratigraphy of the region is fascinating due to its unique rock formations.
   该地区的地层构造因其独特的岩石形成而令人着迷。
3. 3. The geologist discovered a new species of fossilized shell in the ancient layer.
   这位地质学家在古层中发现了一种新的化石贝壳。