rock series

例句：

1. 1. The geologists have discovered several new rock series in the area.
   地质学家在该地区发现了几个新的岩石系列。
2. 2.The rock series has been dated back to the Mesozoic era.
   这个岩石系列可以追溯到中生代。
3. 3.The rock series is a valuable resource for studying the Earth's history.
   这个岩石系列是研究地球历史的重要资源。