摘要
通过对南郑福成奥陶系－志留系界线的笔石组合和笔石体形态等的研究，再次论证了奥陶系与志留系界线以划在Ｇ·ｐｅｒｓｃｕｌｐｔｕｓ带之底为宜，并对界线附近的部分重要和特征笔石进行了描述。
The well -exposed section of Ordovician-silurian boundary at Fucheng,Nanzheng.southernShaanxi,has rich fossils,a small thickness and a complete graptolite sequence.There are obvious differencesboth in graptolite assemblages and in graptolite morphologe between Wufeng Formation of Upper Ordovicianand Lungmachi Formation of Lower Silurian.The Ordovician-silurian boundary of Fucheng is suggested tobe defined between the G.persculptus Zone at the base of Lungmachi Formation and the upermost D.bo-hemicus Zone or the Hirnatia-Kinella fauna of the Wufeng formation.
