江西信丰铁石口剖面晚二叠世的牙形石动物群

对江西省信丰县铁石口剖面晚二叠世长兴阶至铁石口阶下部的牙形石动物群有了新的认识。基于牙形石的研究，将该地区晚二叠世的地层划分为3个牙形石生物带，自上而下分别是：Clarkina changxingensis yini带；Clarkina postwangi带；Clarkina changxingensis带。探讨了浙江长兴煤山标准剖面晚二叠世长兴组至殷坑组下部的牙形石生物带的划分，将这段地层划分为4个牙形石带，自上而下分别是：Clarkina meishanensis meishanensis带； Clarkina changxingensis yini-Clarkina meishanensis zhangi带；Clarkina postwangi和Clarkina subcarinata-Clarkina changxingensis组合带，而最下部的一个带又分为2个亚带，即上部的Clarkina changxingensis亚带和下部的Clarkina subcarinata-Clarkina wangi亚带。最后将铁石口剖面与煤山剖面进行了牙形石生物地层对比，认为铁石口剖面除了长兴组下部被第四纪河床覆盖之外，晚二叠世上部的地层可以完全与煤山剖面进行对比。

Conodont Fauna of Late Upper Permian in Xinfeng Area,Jiangxi Province

A detailed research has been worked on the Late Upper Permian conodont fauna of Tieshikou section in Xinfeng area,Jiangxi Province.Based on the previous study and new materials,three conodont zones were described.In descending order,they were Clarkina changxingensis yini zone, Clarkina postwangi zone and Clarkina changxingensis zone.In addition,the authors also discussed the conodont zonal division of Late Upper Permian strata in Meishan section,Changxing County,Zhejiang Province.Different from the former study,four zones and two subzones were proposed.Finally,a precise correlation between Tieshikou section and Meishan section,the GSSP of Permian-Triassic boundary was done.