rhyolite

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、英质纹质火山角砾纹质熔结凝灰。

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

珍珠、黑耀和松脂等玻璃质熔酸性为主，中基性者也常见。

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，九台营城煤矿区纹中石泡构造发育。