安徽石台下、中奥陶统紫台组的牙形刺  

LOWER TO MIDDLE ORDOVICIAN CONODONTS FROM THE ZITAI FORMATION OF SHITAI,ANHUI PROVINCE,E CHINA

作　　者：吴荣昌[1] 王志浩[1] 

机构地区：[1]现代古生物学和地层学国家重点实验室,中国科学院南京地质古生物研究所,南京210008

出　　处：《微体古生物学报》2008年第4期364-383,共20页Acta Micropalaeontologica Sinica

基　　金：中国科学院创新工程重要方向项目(KZCX3-SW-149);国家基金委基金项目(40532009);科技部973项目(2006CB806402)联合资助

摘　　要：下、中奥陶统紫台组以紫红色泥质灰岩、瘤状泥质灰岩为特征,具有稳定的空间分布范围,沿扬子台地东南缘呈条带状分布,与扬子台地上发育的湄潭组、大湾组等大致同期。作者研究了安徽石台栗阳柳树亭剖面紫台组的牙形刺,共描述19属23种,识别出四个牙形刺带,从下至上分别是Oepikodus evae带、Baltoniodus triangularis带、Baltoniodus navis带和Paroistodus originalis带,并可与同期笔石带对比。除扬子区外,紫台组还可与欧洲、阿根廷前科迪勒拉等地区的同期地层对比。The Lower to Middle Ordovician Zitai Formation consists of a sequence of purple red, nodular argillaceous limestone and has a stable spatial distribution, along the southeastern margin of the Yangtze Platform. The Zitai For- mation is stratigraphically correlative to the Meitan Formation and the Dawan Formation developed on the Yangtze Platform. Based on the collection from the Zitai Formation of Liushuting Section, Shitai County, Anhui Province, East China, conodonts are systematically studied, including 24 species of 20 genera. Four conodont biozones are re- cognized, ascendingly the Oepikodus evae Biozone, the Baltoniodus triangularis Biozone, the Baltoniodus naris Bio- zone and the Paroistodus originalis Biozone. The conodont biozones in the Zitai Formatin can be correlated to those of other areas, such as Yichang region of South China, Europe and Pre-Cordillera of Argentina.

关 键 词：牙形刺 下 中奥陶统 紫台组 石台 安徽 

分 类 号：Q915[天文地球—古生物学与地层学]