dacite

The first rock is mainly andesite clinkering agglomerate, andesite breccia, dacite breccia, rhyolite breccia and rhyolite clinkering tuff.

火山碎亚型主要为安山质熔结集块,安山质、英安质及流纹质火山角砾以及流纹质熔结凝灰。

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.

三塘湖地区早炭世火山活动强烈，发育以安山为主的玄武、安山、英安流纹的组合。