Quaternary foraminiferal fossil in the Tianshuihai area of the Qinghai-Xizang Plateau

IN July,1995,the authors carried out drilling and sampling at the location 100 m to the south-east of the Tianshuihai Lake(35°21′N,79°35′E,4 840 m a.s.l.) in the northwest of theQinghai-Xizang Plateau.The analytical results show that the deposits of lacustrine facies in acorehole and an exposure contain foraminiferal fossils.The late Quaternary foraminiferal fossilwas first found in the Quaternary deposits of lacustrine facies at the hinterland of the Qinghai-