贵州铜仁寒武系与奥陶系界线划分新资料

A New Data on Determination of the Boundary between Cambrian and Ordovician in Tongren, Guizhou

本文首次报导了贵州铜仁一带毛田组底部及中上部牙形石及头足类化石,其地质时代均为早奥陶世早期。这些化石的发现对于铜仁—带寒武—奥陶系界线地层学的研究及区域地层对比,提供了新资料。

The first discovery of conodonts and Cephalopoda in the bottom and the mid-upper of Maoxi Formation located in Tongren,Guizhou is reported in this paper. The age of the fossils is at the beginning of the early Ordovician. This data may provide a new evidence for study of the boundary-stratigraphy and its regional correlation of the strata in this area.