Application of Comprehensive Analysis of Multi‐layered System in the Study of Sedimentary Characteristics——take the Middle Triassic Series Zhifang Formation in the Ordos Basin as an example

The earth is a complex system of atmosphere, hydrosphere (includes the cryosphere), lithosphere, biosphere and solar-terrestrial space,and it is a dynamic system in which all the components are interacting. The essence of the research method of earth system science is to catch the interaction and evolution among the subsystems of the earth system. According to this understanding,this study is based on the guiding ideology of the earth system scientific research method to comprehensively consider the influence of lithosphere, hydrosphere and atmosphere on the research area, and analyze the sediment source in the research by using paleocurrent direction, paleoclimate, tectonic background analysis, clastic composition, and light and heavy mineral characteristics.*