关于吉中地区大河深组的含义及其时代的商榷

Discussion about the meaning and era of Daheshen Formation,the central part of Jilin Province

大河深组主要分布在吉林中部,本文从岩性、时代、生物组合对分布于二叠系寿山沟组之上的中酸性火山岩、火山碎屑岩夹少量的沉积岩进行了分析及对比,阐明了其作为大河深组的意义。

Daheshen Formation is mainly distributed in the central part of Jilin Province.From the lithological characters,era,and biological composition,this article analyzed and contrasted the acidic volcanic rock,pyroclastic rock and a little sedimentary rock above the Permian Shoushangou Formation,clarified its significance as Daheshen Formation.