Microfossils from the Wumishan Formation of the Jixian System in the Ming Tombs,Beijing,China

作     者：Zhang Pengyuan Tianjin Institute of Geology and Mineral Resources, Chinese Academy of Geological Sciences, Tianjin Gu Shuqin Beoing Geological Survey, Beijing Bureau of Geology and Mineral Resources, Beijing 

出 版 物：《Acta Geologica Sinica(English Edition)》 (地质学报(英文版))

年 卷 期：1986年第4期

页      面：13-22+97-98页

学科分类：07[理学] 

主　　题：BW Microfossils from the Wumishan Formation of the Jixian System in the Ming Tombs,Beijing,China 

摘      要：Members Ⅰ-Ⅳ of the Wumishan Formation of the Jixian System are exposed respectively in Mt. Cuihua and Mt. Hushan in the Ming Tombs, Beijing. Black banded cherts which are extensively developed in this formation contain an abundance ofmicrofossils that are well preserved and variable in form. A study of thin sections shows that the microfossils include 10 genera, 12 species, 3 of. species, 2 indeterminate species and 1 unnamed form, of which 1 genus and 7 species are newly erected. The present assemblage is morphologically comparable to those from the Wumishan Formation in the Western Hills of Beijing, Jixian County of Tianjin and Kuancheng of Hebei Province.