This work was jointly supported by the National Natural Science Foundation of China(Grant No.40073020);the Wen-ner-Gren Foundation(Gr.6975).
The cultural deposits at pits T1 and T2 in Zhangkou Cave are intercalated with several flowstone lay- ers. U-series dates show that the capping and 2nd flowstone layers are Holocene of age. The 4th and 5th flowstone l...