Re-division about Fulu Formation and Fulu interglacial epoch in Hunan-Guizhou-Guangxi border area in South China.

The region which Fulu Formation stratotype section is situated at is the one of the preference places of Nahua System stratotype section in Hunan-Guizhou-Guangxi border region in South China. Fulu interglacial epoch can be divided into three warm climate periods and two icy climate periods.They are named as Sanjiang intersatial, Longjia icy stage, Lanyang intersatial, Liangjiehe icy stage and Datangpo intersatial. The strata corresponded with Fulu interglacial is Fulu Fomation. It is divided into five members which are Sanjiang Member, Longjia Member,Lanyang Member, Liangjiehe Member, Datangpo Member. After studing Gucheng Formation stratotype section in Changyang, Hubei Province and Tiesiao Formation stratotype section in Datangpo, Songtao County, Guizhou Province, it showed that both Gucheng Formation and Tiesiao Formation were formed in later Fulu interglacial epoch. They can not substitut for Chang'an Formation as the strata representation in early Nanhua System glaciation period.