摘要
云南墨江志留纪地层从下到上包括漫波组和水箐组。根据在水箐组中发现的大量笔石,从下到上共识别出Colonograptuspraedeubeli带、C.ludensis带、Lobograptusprogenitor带、L.scanicus带和Saetograptusfritschilinearis带等5个笔石带,并将各带与捷克、中亚、加拿大和我国广西等地的相应笔石带进行了详细对比。研究表明水箐组的时代应属文洛克世晚期—罗德洛世中期,其层位应在文洛克世早期的漫波组之上。
Two Wenlock and three Ludlow graptolite biozones,in ascending order Colono graptus praedeubeli Biozone,C.ludensis Biozone,Lobograptus progenitor Biozone,L. scanicus Biozone and Saetograptus fritschi linearis Biozone,are recognized from the Shuiqing Formation in Mojiang,southern Yunnan.The biozonation indicates that the Shuiqing Formation is younger than the Manbo Formation which yields Sheinwoodian graptolite Monograptusflemingii and Monoclimacisvomerina.The Llandovery is absentin this area,whereas the Pridoli is probably present,butnot yet confirmed due to the poor preservation ofthe yielded graptolites.
出处
《地层学杂志》
CSCD
北大核心
1999年第3期161-169,共9页
Journal of Stratigraphy
基金
中国科学院南京地质古生物研究所博士后项目!( 1 997)资助
