Large scale planar geological mapping, profiling survey and microfabric analyses proved that lithophysa structure was developed in rhyolite in Yingcheng coal mine area, Jiutai City.

摘要通过大比例尺平面图、剖面测量和显微组构分析，九台营城煤矿区流纹岩中石泡构发育。

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熔岩以酸性为主，中基性见。

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

正火山碎屑岩亚类岩石类型主要为安山熔结集块岩,安山、英安及流纹火山角砾岩以及流纹熔结凝灰岩。