通过大比例尺平面地质填图、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。
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 .
九台区