Devonian igneous rocks

例句：

1. 1. The Devonian rocks are famous for their fossils.
   德文安纪的岩石因其化石而闻名。
2. 2.The Devonian period is considered a time of great change in the Earth's history.
   德文安纪被认为是地球历史上一个重大变革的时代。
3. 3. The Devonian age was characterized by the appearance of early animals and plants.
   德文安纪时期，早期动物和植物开始出现。