From studies of these characteristics of structures , palaeontology , drilling , well logging , seismic profile , salt chemistry and lacustrine sedimentary system , it is recognized that the new characteristics occur in of section pukou and in huaiyiri sag , and the huge thickness of salt rocks is formed by the crust salt materials upwelling along deep fracture in the form of hot bittern and entering lacustrine basin in this area 通过该区构造、古生物、钻井、测井、地震、盐岩化学及湖盆内沉积体系等特征的研究，认为淮阴凹陷浦口组二段和三段的沉积构造有其特殊性，巨厚的盐岩层是壳深部盐类物质沿深大断裂上涌以热卤水形式进入湖盆的结果。
