andesite

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

喷出岩单元不玄武岩组成，还包括山岩、玻岩、钠长岩砾岩、凝灰岩等。

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

正常火山碎屑岩亚类岩石类型主要为山质熔结集块岩,山质、英质流纹质火山砾岩流纹质熔结凝灰岩。

Perlite, obsidian and pitchstone are volcanic glass having the same compositions commonly with rhyolite as well as andesite and basalt.

珍珠岩、黑耀岩和松脂岩等玻璃质熔岩酸性为主，中基性者也常见。

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.

三塘湖地区早石炭世火山活动强烈，发育山岩类为主的玄武岩、山岩、英流纹岩的岩石组合。