The rock combination and lithofacies of the Late Paleozoic marine volcanic rocks are quite complex. 晚古生代海相火山岩相岩石组合较复杂。
Many gas-bearing volcanic reservoirs were discovered in Xujiaweizi Fault Depression of northern Songliao Basin, especially in Yingcheng I Formation. 摘要松辽盆地北部徐家围子地区深层发育了大量的火山岩体,特别是营城组一段,火山岩相以多期的爆发相和喷溢相空间相互叠置为主。