摘要
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。
Well-preserved weathering crust is discovered at the top of the Changxing Formation in Huangzhishan section, Huzhou, Zhejiang. The characteristics of the weathering crust are described in this paper. The unconformity represented by the weathering crust is located at the lowermost part of Clarkina rneishanensis rneishanensls Zone. In stratigraphic horizon, it can be correlated with the bottom of the Bed 25 at the Meishan Section D and is coincident with the main episode of the mass extinction at the end- Permian. Therefore, it is very significative for discussing the sea-level change and the causes of the mass extinction at the end-Permian to study the weathering crust in detail.
出处
《地质论评》
CAS
CSCD
北大核心
2009年第4期503-508,共6页
Geological Review
基金
国家自然科学基金创新团队项目(编号40621002)
111项目(编号B08030)
教育部高等学校博士学科点专项科研基金项目(编号20060491502)的成果
关键词
二叠纪末
风化壳
海平面变化
牙形石生物地层带
浙江
the end-Permian
crust of weathering
sea-level change
conodont biostratigraphy
Zhejiang
