为研究江苏东部沿海平原区第四纪环境变迁,查明第四纪期间的海侵、海退过程,寻求海面变动与湖面变动间的关系,并试图以地磁地层学的方法对当地的第四纪地层进行划分与对比.近年来,中国科学院海洋研究所曾对江苏盐城孔、弶港孔、启东孔和位于长江南岸的嘉定孔(上海市)地层进行了系统分析,包括微体化石群的定性分析(有孔虫、海陆相介形类)、软体动物群鉴定、古地磁系统测量和少量样品的C~(14)测年.为配合沉积环境 In order to study the environmental change of the Quaternary in the coastal plain area of ​​eastern Jiangsu Province, identify the process of transgression and regression during the Quaternary period and seek the relationship between the sea surface change and the lake surface change. At the same time, In recent years, the Institute of Oceanology, Chinese Academy of Sciences has systematically analyzed the stratigraphy of Yancheng hole, Huanggang hole, Qidong hole and Jiading hole (Shanghai) located on the south bank of the Yangtze River in recent years, including the microfossils Qualitative analysis (Foraminifera, marine and terrestrial ostracods), hermaphrodite identification, paleomagnetism system measurements and C ~ (14) dating of a small amount of samples.