Acta Scientiarum Naturalium Universitatis Pekinensis

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Conodont Stratigraphic Evidence for the Age of the Guanling Fauna, Guizhou Province, China

SUN Zuoyu, HAO Weicheng, JIANG Dayong   

  1. Department of Geology, Peking University, Beijing, 100871
  • Received:2001-08-08 Online:2003-01-20 Published:2003-01-20


孙作玉, 郝维城, 江大勇   

  1. 北京大学地质学系,北京,100871

Abstract: Samples collected from the Wayao Formation, which yields the Guanling Fauna, and the underling formation, the Zhuganpo Formation, were treated for conodont analysis. The study result shows that two conodont zones, Paragondolella polygnathiformis-P.tadpole Assemblage Zone and the P. polygnathiformis Zone can be recognized. Comparing with the international and domestic related information, a conclusion can be drawn that their epoch should belong to the Middle or Late Carnian of the Late Triassic. So the final result indicates that the age of the Guanling Fauna belong to the middle Carnian of the Late Triassic, maybe the late Carnian, not to the Ladinian of the Middle Triassic.

Key words: the Guanling Fauna in Guizhou, Wayao formation, Zhuganpo formation, Carnian

摘要: 通过对关岭动物群产出层位瓦窑组及其下伏地层竹杆坡组采集到的牙形石样品进行处理,得到典型牙形石带分子Paragondolella polygnathiformisParagondolella tadpole。经对比,可知竹杆坡组顶部和瓦窑组的时代为晚三叠世卡尼期中期或晚期,而不是中三叠世拉丁期,从而表明关岭动物群的时代是晚三叠世中-晚卡尼期。

关键词: 贵州关岭动物群, 瓦窑组, 竹杆坡组, 卡尼期

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