In the Ranger area highly chloritic rocks were believed to be altered dolerites. 兰杰地区的强烈绿泥石化岩石据信可能是蚀变粒玄岩。
Up to the present, the important breakthrough has been made in entire volcanic rocks in eastern area, discovering trachyte and dolerites oil reservoirs. 截至目前,在整个东部凹陷取得了火成岩勘探的重大突破,发现了粗面岩、辉绿岩油藏。