extrusive

Basic, acidic extrusive and volcanoclastic rocks are known as the main rock types.

石炭纪末期本区岩浆活动开始,早二叠世晚期和晚二叠世早期是两个主活动期。

The extrusive rock unit includes basalt, andesite, boninite and albitite as well as breccia and tuff.

喷出岩单元不仅仅由玄武岩组成，还包括安山岩、玻安岩、钠长岩以及角砾岩、凝灰岩等。