According to the theory of sediment gravity flow that was raised in the seventies of this century, and judging from the field observations on the deposition facies and their evolution sequences of eleven sections, the so-called tillites of Sinian Period in several areas of China are divided into three kinds of gravity flow sediments: the model o abyssal gravity flow deposition in the East of Guizhou Province, the model of shallow marine gravity flow deposition in Luoquan of Henan Province and in Shang-changwan of Shanxi Provence, and the model of trausgressional gravity flow deposition in wangjiawan of Yunnan Provence. In many respects, such as the developed degree, the kinds of gravity flow, the extent of depositional facies, the depositional tectonics and the chemical compositions, they are not only distinctive but also connected entities of the gravity flow sediments.
