New data of nannofossils in the Shadui Formation in the Yamzho Yumco area, Tibet

During 1∶50000 regional geological surveys of the Qongguo Sheet and Qoidekong Sheet, the nannofossil Braarudosphaera-Prediscosphaera assemblage was collected in the Shadui Formation in the Yamzho Yumco area, Tibet. It shows the features of the Late Cretaceous biotic assemblages. Thus this verifies that stratigraphic zoning exists inside the Kangmar-Lhunze zone.