decomposed rock

例句：

1. 1. The area around the volcano is home to many decomposed rocks.
   火山周围的地区有许多分解的岩石。
2. 2.The geologists were studying the decomposed rocks for clues about the past.
   地质学家正在研究分解的岩石，寻找过去的迹象。
3. 3. The weather has caused some of the rocks to decompose over time.
   天气变化导致一些岩石在时间推移中分解。