• 责任者：Zhou Xiaodong (Regional Survey of Geology and Mineral Resources of Jilin Province ; Changchun 130022 ; China) ; Li Dongjin
• 刊名：Acta Petrologica Sinica
• 出版年：2013
• 卷期：52(3)
• 关键词：中二叠世 ; Middle Permian ; 牙形石 ; conodonts ; 吉林 ; Jilin Province
• 页码：p.294-308
• 图表：illus., 2 plates, 62 refs.
• 分类号：1200
• issnNo：ISSN1000-0569
• isbnNo：CN11-1922/P

     The age of the Dahesen Formation in Huadian County, Jilin Province, is debated for a long time. The majority authors assigned this formation to Early Permian. The present authors systematically collected conodont samples from named-section of this formation, and found some conodonts inclu- ding Mesogondolella aserrata , Mesogondolella da- heshenensis sp. nov. Wang, Mesogondolella sub- gracilis sp. nov. Wang, Mesogondolella sp. B, Mesogondolella sp. X. Based on mainly the pres- ence of Mesogondolella aserrata, the age of the Daheshen Formation should be assigned to Word- ian Stage of Middle Permian.