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根据对泥河湾盆地地层古生物学的最新研究,初步认为泥河湾盆地出露地表的河湖沉积物可以分为蔚县组/稻地组和泥河湾组,并建议废弃其他不规范的岩石地层组名称。稻地老窝沟剖面和东窑子头大南沟剖面地层出露全,含化石丰富,在泥河湾盆地中很有代表性,产出的哺乳动物化石被归入4个具有演化意义的组合。大南沟剖面被选定为泥河湾组的典型剖面,并划分为4个岩石地层段,所发现的化石代表了第四纪哺乳动物演化的3个阶段。本文同时还对“泥河湾层”的划分、对比和时代进行了讨论。
According to the latest research on the paleontology in the Nihewan Basin, it is preliminarily believed that the surface sediments of the rivers and lakes in the Nihewan Basin can be divided into the Yuxian Group, the Dadi Group and the Nihewan Formation, and the other non-standardized ones Rock formation group name. The Laoguo Gou section in the paddy field and the Dagangogou section in the Dongyaozitou area are all exposed, contain abundant fossils and are very representative in the Nihewan Basin. The mammalian fossils produced are classified into four evolutive combinations. The Dagangou section has been selected as a typical section of the Nihewan Formation and divided into four lithostratigraphic sections. The fossils discovered represent three stages of Quaternary mammal evolution. In the meantime, this article also discusses the division, comparison and the times of “Nihe Bay”.