【作者】 段承华； 肖兵；

【Author】 Duan Chenghua (Tianjin Institute of Geology and Mineral Resources) Xiao Bing (Xinjiang Institute of Geology and Mineral Resources)

【机构】 天津地质矿产研究所； 新疆地质矿产研究所；

【摘要】 继钱建新、肖兵(1984)之后,作者重新研究了玉尔吐斯组建组剖面及所含小壳化石,所取得的新进展之一是于剖面底部发现了Anabarites trisulcatus一种,为确定玉尔吐斯组时代获得了重要化石证据。作者将玉尔吐斯小壳动物群划分为三个化石带,并将玉尔吐斯组与扬子区梅树村阶对比,唯前者的底界可能略高。文中讨论了"非三叶虫带"存在三叶虫的可能性,认为最近被报道的西蒿坪组三叶虫碎片应为梅树村期产物。文中尚描述有小壳化石新属4和新种18。更多还原

【Abstract】 The Lower Cambrian Yurtus Formation in Wushi-Aksu district,Xinjiang, is a unit yielding abundant small shelly fossils,the type section of which was first reported by Qian Jianxin and Xiao Bing in 1984.They correlated the Yurtus Formation with the Meishucunian Stage of the Yangtze Platform. After this,some reserchers of China considered that the Yurtus Formation is the same age as the Xihaoping Formation in Fangxian,Hubei,and both of them are younger than the Meishucunian Stage.The authors studied the type section——Section 22(in this paper) of Yurtus Formation second time and some new progresses have been made.Here the age of Yurtus and Xihaoping Formations,is further discussed.更多还原