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沿南朝鲜东海岸五个孤立地区分布的晚第三纪沉积都包括在浦项盆地内。浦项区最大,其沉积物分为两个群。下群为阳北群,由陆相沉积组成,而上群为延日群,主要由含丰富海生动物化石的海相沉积组成,它包括五个组。延日群分成三个有孔虫带,六个软体动物组合,四个硅藻亚带,两个硅鞭毛虫亚带和三个超微化石亚带。延日群的时代为中中新世。当时以冷流为主,偶有暖流侵入。文中对浦项区和其它区的沉积对比作了讨论。上新世沉积仅存在于济州岛的西归浦城附近。西归浦组时代较可能是上新世(Blow的N19—N21带),并是在温暖开阔海的海岸带内沉积的。
Late Tertiary sediments distributed along five isolated areas on the east coast of South Korea are included in the Pohang Basin. Pohang District, the largest, the sediment is divided into two groups. The lower group is the Yangbei group, which consists of continental sediments, while the upper group is the Yanian group, consisting mainly of marine sediments rich in fossil marine fossils. It consists of five groups. The delaminating group is divided into three foraminiferal belts, six mollusc assemblages, four diatom sub-belts, two silicone diaphora subbands and three superficial fossil sub-belts. The epoch of Yanlin group was Miocene. At that time, mainly cold flow, occasional thermal flow intrusion. Discussed the deposition contrast of Pohang and other areas. Pliocene sediments exist only in the vicinity of Seogwipo in Jeju Island. The Seogipo Formation was more likely to be Pliocene (Blow’s N19-N21 belt) and deposited within the warm and open sea coast.