Acta Scientiarum Naturalium Universitatis Pekinensis

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Carnian (Late Triassic) Ammonoid Biostratigraphy in Luoping County, Eastern Yunnan Province, China

LI Yan, SUN Zuoyu, SUN Yuanlin, JIANG Dayong, HAO Weicheng   

  1. School of Earth and Space Science, Peking University, Beijing 100871;
  • Received:2012-03-27 Online:2013-05-20 Published:2013-05-20



  1. 北京大学地球与空间科学学院, 北京 100871;

Abstract: The present study is based on ammonoids collected from the strata above the ammonoid Trachyceras multituberculatum zone of Wayao Member of “Falang Formation” (Late Triassic) at the Niubudai Section in Luoping County, Eastern Yunnan Province. Eight species of four genera, including one conform species and three indeterminate species were recognized, among which Trachyceras aonoides, Simonyceras simonyi are firstly found in China. According to their assemblage and stratigraphic distribution, two ammonoid zones were recognized in ascending order: Trachyceras aonoides Zone, Austrotrachyceras triadicum Zone, corresponding to the middle-late Early Carnian of Late Triassic in age.

Key words: ammonoids, Late Triassic, “Falang Formation”, Luoping County, Yunnan Province

摘要: 描述了产于云南省东部罗平地区牛补歹剖面上三叠统“法郎组”瓦窑段菊石带Trachyceras multitube- rculatum带之上地层中的菊石4属8种(含1比较种和3未定种), 其中Trachyceras aonoides, Simonyceras simonyi系国内首次报道。 依据各物种组合特征及其地层分布情况, 自下而上识别出菊石Trachyceras aonoides带和Austrotrachyceras triadicum带, 时代上大致对应晚三叠世早卡尼期的中晚期。

关键词: 菊石, 上三叠统, “法郎组”, 罗平, 云南省

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