The filling sequence and stratigraphic framework of rift basin during the Neoproterozoic 820-635 Ma in Hunan, Guizhou and Guangxi

A set of Neoproterozoic(820-635 Ma)sedimentary strata are developed in Hunan, Guizhou and Guangxi, which occur above the Wuling Movement and below the Zhendan System, serving as the formation of lift basin with the well developed succession and clear sedimentary boundary. The stratigraphic system, according to the stratigraphical division and correlation of the regional rock and strata in combination with the recent results of chronology, shows a completed distribution and evolution, successive strata, and a clear division mark; it therefore can be completely divided and contrasted. On the basis of the stratigraphic division and correlation, the authors formulated a stratigraphic framework, which presents a set of detailed and accurate data for studying the stratigraphic division and correlation of the Neoproterozoic ( 820- 635 Ma) sedimentary strata in the Yangtze Paleocontinent, and also offers the new resultant data for studying the Precambrian including the Neoproterozoic in China.