andesite

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

喷出单元不仅仅由玄武，包括山、、钠长以及角砾、凝灰等。

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

正常火山碎屑亚类石类型主要为山质熔结集块,山质、英质及流纹质火山角砾以及流纹质熔结凝灰。

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

珍珠、黑耀和松脂等璃质熔以酸性为主，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，发育以山类为主的玄武、山、英流纹的石合。