黔北地区晚寒武世至早奥陶世初期的牙形石分带及界线讨论  

A Discussion on Conodont Zonation of Late Cambrian to the Beginning of Early Ordovician and Cambrian Ordovician Boudary in Northern Guizhou

作　　者：金少荣[1] 

机构地区：[1]贵州省地质矿产勘查开发局102地质大队

出　　处：《贵州地质》1996年第3期213-219,共7页Guizhou Geology

摘　　要：根据所获的丰富的牙形石资料，较系统地将黔北地区上寒武统顶部及下奥陶统底部建立了四个可进行区域性对比的牙形石带，把寒武系和奥陶系的界线控制在Ｍ．Ｓ带与Ｃ．Ｐ带之间１８．２９ｍ的范围之内，这是我省目前已知的寒武、奥陶系界线控制的最短距离资料，为准确划定黔北地区寒武系和奥陶系的界线提供了资料。According to available data, 4 conodont zones are established from the top of Upper Cambrian to the base of Lower Ordovician of Northern Guizhou, which can be used to correlate regionally. The Cambrian-Ordovician boundary is constrained within a 18. 29 m distance between Monocostodus sevierensis and COrdylodus prosy us Zones. It is the known shortest distance so far constraining Cambrian-Ordovician boundary of Guizhou, and thus provides evidence for defining correctly Cambrian-Ordovician boundary of Northern Guizhou.

关 键 词：地层 牙形石 分带 界线 晚寒武世 早奥陶世 

分 类 号：Q915.641[天文地球—古生物学与地层学] Q915.642[生物学—古生物学]