• 责任者：Luo Hui (Nanjing Institute of Geology and Palaeontology ; Chinese Academy of Sciences ; Nanjing 210008 ; China) ; Zhou Zhicheng
• 刊名：Journal of Stratigraphy
• 出版年：2013
• 卷期：37(1)
• 关键词：晚二叠世 ; Upper Permian ; 早三叠世 ; Lower Triassic ; 生物地层学 ; biostratigraphy ; 地层界线 ; stratigraphic boundary ; 四川 ; Sichuan Province
• 页码：p.81-92
• 图表：illus., 3 plates, 39 refs.
• 分类号：1200
• issnNo：ISSN0253-4959
• isbnNo：CN32-1187/P

A dolomite unit near the Permian-Triassic boundary has long been used as the boundary marker in northwestern Sichuan but no biostratigraphically diagnostic fossils have been found in this units. Here we report the discovery of the conodont Hindeodus parvus and foraminifer disaster species from a microbiate bed in the dolomite unit above Permian coral beds at the Yudongzi section in Jiangyou of Sichuan Province. This discovery allows us to determinate the Permian-Triassic boundary in northwestern Sichuan and to understand the ecological and environmental changes across the boundary. We also present a detailed sedimentological analysis of the uppermost Changxing Formation and the lower-middle Feixianguan Formation