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通过浙江湖州黄芝山剖面的研究,发现其长兴组顶部存在清晰古风化壳残积物,本文描述了该古风化壳的沉积特征。精细的牙形石古生物地层学研究表明,该古风化壳代表的平行不整合面位于Clarkina meishanensis meishanensis带的底部,其层位相当于浙江煤山D剖面的25层底部,与二叠纪末生物集群灭绝主灭绝期层位基本一致。所以深入研究该古风化壳对探讨二叠纪末海平面变化和生物集群灭绝具有重要意义。
Through the study of the Huangzhi Mountain section in Huzhou, Zhejiang Province, it is found that there is clear paleo-weathering crust remnant in the top of the Changxing Formation. This paper describes the sedimentary characteristics of the paleo-weathering crust. The study on the fine conodont palaeontology stratigraphy shows that the parallel unconformity surface represented by this ancient weathering crust is located at the bottom of the Clarkina meishanensis meishanensis belt and the horizon corresponds to the 25th floor of the D section of Meishan, Zhejiang Province, Extinction of the main extinct cluster level are basically the same. So in-depth study of the ancient weathering crust is of great significance to explore the end of the Permian sea level changes and the extinction of biological clusters.