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苏北盆地真武组建于1976年苏北江都县真武苏61井,岩性为一套黑、红色砂泥岩沉积,与阜宁组呈连续过渡关系,与上覆戴南组-三垛组呈不整合关系。岩性自下而上由黑变杂,由细变粗,反映了退覆的沉积特征。同时真武组介形类动物群在华南诸省均有相应的层位。笔者通过真武组与华北孔店组的介形类组合特征进行分析和对比后,认为两者的层位相当。因此,苏北盆地和华北盆地的第三纪成盆期有先后关系。
Zhenwu Basin, Northern Jiangsu Province, was established in Zhenwu Su 61 well in Jiangdu County, Northern Jiangsu Province in 1976. Its lithology is a set of black and red sandstone and mudstone deposits, showing a continuous transitional relationship with the Funing Formation. Integrate relationships. From the bottom up, lithology is changed from black to heterogeneity, which changes from thin to coarse, reflecting the sedimentary features of the deposi- tions. At the same time, the Zhenwu Formation ostracods have corresponding horizon in all provinces of South China. Through the analysis and comparison of the characteristics of the meso-categories of Zhenwu Formation and North Kong Kongdian Formation, the author thinks that the layers of the two are quite similar. Therefore, there is a relationship between the Tertiary basin and the basin of North China and the North China basin.