Discussion on Depositional Mode of Huagang Formation in Xihu Trough,the East China Sea

According to the drilling data of Xihu Trough, this paper gives a synthetical discussion on the facies-controlling mechanisms of tectonic actions and invasion of the sea in the deposion of Huagang Formation, puts forward some personal views on so-called "reworking fossils" in Huagang Formation, and establishes a depositional mode for Xihu Trough.