Jurassic-Cretaceous boundary and its terrestrial issue in Northern China.
WAN Xiaoqiao,GAO Lianfeng,QIN Zuohuan,CUI Can1,LI Wei,XI Dangpeng
State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing 100083, China 2. College of Mining Engineering, North China University of Science and Technology, Tangshan 063009, China 3. Department of Geological Engineering, Qinghai University, Xining 810016, China