论渭北地区中奥陶世地层“平凉组”的岩石地层学分析

Discussing the Mid-Ordovician“Pingliang Formation”of Weibei Area from the Lithostratigraphic Field

从岩石地层学角度探讨了地层命名的依据，并通过对渭北地区中奥陶世地层、沉积环境及岩相特征的研究指出：该区中奥陶世晚期的地层名称应使用泾阳组，而不是平凉组。

The distributive characters of the Formation are discussed in the lithostratigraphic field, Bystudying the mid-Ordovician strata,sedimentary environment and lithofacies of Weibei area,the au-thor points that the mid-Ordovician strata of Weibei area are called the Jingyang formation instead ofthe Pingliang formation。