| 乐平统底界定义和广西来宾蓬莱滩剖面点位的讨论 |
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| 引用本文： | 王成源.乐平统底界定义和广西来宾蓬莱滩剖面点位的讨论[J].地质论评,2001,47(2):113-118. |
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| 作者姓名： | 王成源 |
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| 作者单位： | 中国科学院南京地质古生物研究所,210008 |
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| 基金项目： | 国家自然科学基金(编号49272078) |
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| 摘 要： | Clarkina Postbitteri的首现不适合作为乐平统底界的定义，蓬莱滩剖面上6j的底界也不适合作为乐平统底界的全球界线层型剖面点（GSSP），乐平统底界的定义应是Clarkina postbitteri-C.dukouensis连续的演化系列中C.dukouensis的首次出现，精确的位置在蓬莱滩剖面6k之底。
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| 关 键 词： | 乐平统 蓬莱滩剖面 广西 鲁平统 底界 二叠系 牙形刺 |
Discussion on the Definition of the Lopingian Series Basal Boundary and the Point in the Section of Penglaitan, Laibin, Guangxi |
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| WANG Chengyuan Nanjing Institute of Geology and Palaeontology,Academia Sinic,Nanjing,China.Discussion on the Definition of the Lopingian Series Basal Boundary and the Point in the Section of Penglaitan, Laibin, Guangxi[J].Geological Review,2001,47(2):113-118. |
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| Authors: | WANG Chengyuan Nanjing Institute of Geology and Palaeontology Academia Sinic Nanjing China |
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| Abstract: | The first appearance (FAD) of Clarkina postbitteri is not suitable to be used as the definition of the basal boundary of the Lopingian Series in the Penglaitan section, nor is the base of bed 6j suitable to be used as the GSSP of the Lopingian. The basal boundary of the Lopingian should be defined by the FAD of Clarkina duk-ouensis in the Clarkina postbitteri-C. dukouensis evolutionary lineage. The precise position of the FAD of C. dukouensis in the Penglaitan section is at the base of the LPD114. 6-6k (GSSP). |
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| Keywords: | basal boundary Lopingian Clarkina postbitteri Clarkina dukouensis Penglaitan Guangxi |
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