安山岩

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。

Volcanicity was violent during the Early Carboniferous in Santanghu region.The volcanic rocks consist of basalts,andesites and dacite liparite,with andesites playing the main part.

地区早石世火山活，发育以安山岩类为主的玄武岩、安山岩、英安流纹岩的岩石组合。