| Institution: | YAO Jianxin~(1,*),JI Zhansheng~1,WANG Liting~2,WANG Yanbin~1,WU Zhenjie~1,LIU Dunyi~1,WU Guichun~1,ZHANG Jianwei~1 and LI Suping~1 1 Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China 2 Guizhou Bureau of Geology and Mineral Resources,Guiyang 550004,China |
| Abstract: | The demarcation of the Lower-Middle Triassic boundary is a disputed problem in global stratigraphic research.Lower-Middle Triassic strata of different types,from platform to basin facies, are well developed in Southwest China.This is favorable for the study of the Olenekian-Anisian boundary and establishing a stratotype for the Qingyan Stage.Based on research at the Ganheqiao section in Wangmo county and the Qingyan section in Guiyang city,Guizhou province,six conodont zones have been recognized,which can b... |
