The succession,division and correlation of these strata are studied with lithostratigraphy, biostratigraphy and isotopic geochronology methods and by the combination of of point, line and area.

• 采取点、线、面相结合，岩石地层学、生物地层学和同位素年代学相结合的工作方法，研究了这套地层的层序、划分和对比问题；