Abstract: This paper deals with three stratigraphical sections bearing Ordovician conodonts, which is exposed at Tangshan Mt., Mufushan Mt. and Lunshan Mt. in the vicinity of Nanjing, China. It has been were than 100 years since the Ordovician strata sediment was discovered in Nanjing, but detailed stratigraphic----Palaeontological studies began only in the 1950's. From a careful study on Ordovician conodonts obtained, in 1977-1979, the authors are able to establish some is conodont zones in the Ordovician, from lower, upwards. Tangtou Formation Icriodella baotaensis-Zone Pagpda Formation Hamarodus europaeus-Zone Tatianba Formation polyplacognathus jianyeensis-Zone Guniutan Formation Eoplacognathus foliaceus-Zone E, pseudoplanus-Zone Amorphognathus antivaiabilis-Zone Dawan Formation Baltoniodus novis-Zone Paroistodus orginalis-Zone Oistodus aff mulficorrugatus-Periodon flabellum-Zone Oepikodus evae-Zone Hunghuayuan Formation Serratognathus diversus-Zone Lunshan Formation Scolopodus barbalus-Zone S. quadrdplicatus-Zone Acothodus costadus-"Acodus" oneotensis-Zone Monocoslodus sevierensis-Zone The Ordovician Conodom zones in the Ningzhen Mts. can be correlated with those of the Yichang regian as given in table Ⅰ. The conodont faunas include about species representing more than 46 genera of which, 3--species are new and described here

摘要： 宁镇山脉地区奥陶系是我国东南地区标准剖面,文中在原有地层划分的基础上,除最上部的五峰组以外,其它8个组中均发现牙形石,并且建立了16个牙形石化石带.同时在文中把本区的16个牙形石化石与国內外一些奥陶系标准地区对比.特别是与宜昌三峡地区对比过程中,发现除个别化石带以外,其它均可以对比,因此为长江中、下游地区钻井寻找下古生界油、气提供了划分奥陶系的微体化石依据.文中还描述了三个牙形新种化石.