【作者】 汪啸风； 曾庆銮； 周天梅； 倪世钊； 徐光洪； 孙全英； 李志宏； 项礼文； 赖才根；

【Author】 Wang Xaofeng,Zeng Qingluan, Zhou Tianmei,Ni Shizhao, Xu Guanghong,Sun Quanying, Li Zhihong (Yichang Inst.Geol.and Min.Res., Chinese Acad.Geol.Sci.) Xiang Liwen,Lai Caigen (Geol.Inst.,Chinese Acad.Geol.Sci.)

【机构】 中国地质科学院宜昌地质矿产研究所； 中国地质科学院地质研究所；

【摘要】 <正>奥陶系与志留系界线的划分及相应的界线层型剖面的选择问题随着国际地质科学联合会奥陶系与志留系界线工作组不断加快选举的进程而愈加引起国际上有关同行的关注。在"中国三峡东部地区奥陶系与志留系界线的生物地层"(汪啸风等,正在印刷)一文中,对本区奥陶系与志留系界线的研究历史已经作了说明并初步阐明了我们对这一问题的意见。更多还原

【Abstract】 INTRODUCTION The defining of the Ordovician-Silurian boundary and the choice of its boundary stratotype,as a problem under review,has drawn great attention from colleagues all over the world as the work of the IGCP Ordovician-Silurian Boundary Working Group is progressing toward the voting of a stratotype. The study history of the Ordovician-Silurian boundary in the eastern Yangtze Gorges and the preliminary views on the determination and correlation of the Ordovician-Silurian boundary,achieved through the studies of Wangjiawan,Fenxiang and Huanghuachang Section(fig.1),have been presented in a paper on"the Ordovician-Silurian boundary biostratigraphy in the eastern Yangtze Gorges,China".Based on the more recent data,the present paper,as a continuation of the previous one,will further discuss the correlation of the latest Ordovician-earliest Silurian fossil zones and the position of the Ordovician-Silurian boundary,with an account of a part of main fossils. As the space is limited,other fossils will be dealt with in another paper.更多还原