国家自然科学基金青年科学基金“湖南寒武系第三统混积岩特征及沉积环境研究”编号:41302093资助的成果.This paper is supported by National natural science foundation of China youth science fund "The Research on the Mixed Rock Characteristic and Sedimentory Environment of the Series 3 of the Cambrian,Hunan" 41302093