Division and correlation of precious fossilbearing beds
of the Jiufotang Formation in Jianchang Basin western Liaoning|China
Duan Ye1,2 Zhang Lijun1 Zhang Lijun3,4 Hu Dongyu1
1.Palaeontological Institute of Shenyang Normal University|Shenyang 110034； 2.State Key Laboratory of Geological Processes and Mineral Resources|China University of Geosciences|Beijing 100083； 3.Bureau of Protection Management of Fossil Resources Liaoning Province|Shenyang 110032； 4.International Center for Geosciences Research and Education in Northeast Asia|Jilin University|Changchun 130061
For studying birds，reptiles and angiosperms early evolution，radiation movement，biodiversity and synergetic evolution，authors measured a part of the Jiufotang Formation section，and systematically collected in precious fossils as keypoint object. As a research results，this paper synthesize predecessors results，the Jiufotang Formation of the Lower Cretaceous is divided into 1st to 3rd members in ascending order. In which，Xidian bed of 1st member of the Jiufotang Formation contains birds，reptiles and turtles precious fossils. There also found many ostracods：Cypridea decorosa，C. jianchanensis，Yumenia jianchanensis，Limnocypridea slundensis，L. levigata，L. rara etc. These ostracods fossil assemblages indicate that this bed can correlate with section of XiaogushanShaoguodi Jiufotang Kazuo and lower part of 1st member of the Jiufotang Formation at XiaobeishanHuangdaoyingzi section of Boluochi Chaoyang Country，both horizons are approximately same.