lithophysa

, volcanic lava and pyroclastic rocks, of which the lithophysa rhyolite, pellets rhyolite and ignimbrite are favorable reservoirs.Lithofacies can be divided into 5 facies and 16 subfacies.

研究表明：该区火山岩划分为火山熔岩和火山碎屑岩两大类，其中石泡流纹岩、球粒流纹岩及熔结凝灰岩为有储层。

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。