• 责任者：Fan Junxuan (State Key Laboratory of Palaeobiology and Stratigraphy ; Nanjing Institute of Geology and Palaeontology ; Chinese Academy of Sciences ; Nanjing 210008 ; China) ; Wu Lei
• 刊名：Journal of Stratigraphy
• 出版年：2013
• 卷期：37(4)
• 关键词：五峰阶 ; Wufengian Stage ; 龙马溪阶 ; Longmaxian Stage ; 生物地层学 ; biostratigraphy ; 四川 ; Sichuan Province
• 页码：p.513-520
• 图表：5 illus., 15 refs.
• 分类号：1200
• issnNo：ISSN0253-4959
• isbnNo：CN32-1187/P

     The Sichuan South China. Recen xinqiao section and tly the Basin is the most important area for the exploration and development of shale gas in we investigated two sections at Qilin, Xingwen County, Sichuan Province, the Qi  Qilin Well section. The biostratigraphic sequence of the Wufeng to Lungmachi black shales has been recognized, including eleven graptolite biozones and one shelly assemblage from the Dicellograptus complexus Zone of the Katian stage （Upper Ordovician） to the Stimulograptus sedgwickii Zone of the Aeronian Stage （Llandovery, Silurian）. The sequence can be correlated regionally and global- ly. From the unweathered outcrop at the Qixinqiao section, we found a continuous transition of litho-facies and bio-facies from the Kuanyinchiao Formation to the Lungmachi Formation, which represents the rapid change from the Hirnantia shelly fauna to the graptolite fauna of the Metabolograptus persculptus Zone, and the change from the well-oxygenated water to the anaerobic or dysaerobic water. This transition also represents the global sea-level rising resulted from the rapid glacial melting after the Hirnantian icehouse.