Conodont Evidence for the Age of the Panxian Fauna,Guizhou,China  

作　　者：SUN Zuoyu SUN Yuanlin HAO Weicheng JIANG Dayong 

机构地区：[1]School of Earth and Space Sciences, Peking University, Beijing 100871

出　　处：《Acta Geologica Sinica(English Edition)》2006年第5期621-630,共10页地质学报（英文版）

基　　金：This study was financially supported by grants from the"985"project of Peking University,National Natural Science Foundation of China(grant 40272005);the Major Basic Research Projects of China(grant G2000077700).

摘　　要：Detailed conodont analysis on the Yangjuan-Chupiwa section, Xinmin, Panxian County, Guizhou Province, revealed a conodont sequence including four Anisian conodont zones, viz. Nicoraella germanica Zone, Nc. kockeli Zone, Paragondolella bifurcata Zone and Neogondolella constricta Zone. These zones indicate that the upper Guanling Formation consists of strata from the Bithynian to the lllyrian of the Anisian. Appearance of Neogondolella constricta suggests that the Anisian/Ladinian boundary might be in the overlying Yangliujing Formation. The Panxian Fauna with well-preserved marine reptile and fish fossils is proved to belong to the lower part of the conodont Nc. kockeli Zone in the studied area. Thus, the age of the Panxian Fauna could be the early Pelsonian of the Anisian.Detailed conodont analysis on the Yangjuan-Chupiwa section, Xinmin, Panxian County, Guizhou Province, revealed a conodont sequence including four Anisian conodont zones, viz. Nicoraella germanica Zone, Nc. kockeli Zone, Paragondolella bifurcata Zone and Neogondolella constricta Zone. These zones indicate that the upper Guanling Formation consists of strata from the Bithynian to the lllyrian of the Anisian. Appearance of Neogondolella constricta suggests that the Anisian/Ladinian boundary might be in the overlying Yangliujing Formation. The Panxian Fauna with well-preserved marine reptile and fish fossils is proved to belong to the lower part of the conodont Nc. kockeli Zone in the studied area. Thus, the age of the Panxian Fauna could be the early Pelsonian of the Anisian.

关 键 词：CONODONT Panxian Fauna Pelsonian ANISIAN Middle Triassic Panxian GUIZHOU 

分 类 号：Q915.6[天文地球—古生物学与地层学] P534.51[生物学—古生物学]