Terms containing fossil rock

Subject	English	Chinese
scient.	discover fossils in the lowest level of rock	在岩石的最底层发现化石
tech.	fossil rock	石灰石
scient.	The harder and more altered the rock, the more difficult it is to find the delicate remains of the fossils.	岩石越坚硬、变化越多、发现微小化石遗迹就越困难。