华北盆地南部晚古生代孢粉组合及上二叠统下限
Late Palaeozoic Sporopollen Assemblages and the Low Limit of Upper Permian in the Southern North China
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摘要: 根据华北盆地南部周参13等井的孢粉化石资料,建立了三个孢粉组合、五个亚组合。论述了它们的地质时代,进而确定了二叠系下统与二叠系上统的界限。Abstract: Based on the sporopollen fossils data in Well Zhoucan 13 and other wells in the southern North China,it establishes 3 sporopollen assemblages and 5 subassemblages. Their geological eras are discussed. The interface of .the Upper and Lower Permian is defined.