The microfossils in phosphate deposit in Doushantno stage, Sinian System, Weng'an, Guizhon Province

The aim of this study is to discuss the microfossils in phosphate deposit i n the Doushantuo stage, Sinian System, Weng'an, Guizhou Province. Based on the detailed observation in morphology and microstructures, it is considere d that those acritarchs with interior spicules probably belong to sponge an imals. However, some explanations for a part of soft-tissue are still contr ioversial. The reliable conclusion still needs more evidence to study. The scientific significance of this study and the key questions for further stu dies are suggested here.