1. 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安山质熔结集块岩,安山质、英安质及流纹质火山角砾岩以及流纹质熔结凝灰岩。
2. 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以酸性为主，中基性者也常见。
3. 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地质续图、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造发育。

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