Continental sequence has its own characteristics.Firstly

its base level is a curved rather than a horizontal surface and has a higher elevation than that of sea level.The method proposed by Cross solved this problem appreciatively

but its final result has to be checked by seismic data.Secondly

geological age of sequences is difficult to be determined.More work should be carried out in physical

radioisotopic and chemical age dating.Thirdly

continuous strong reflections should be deal with correctly.Not all continuous strong isopic axes are sequences boundaries

and none of the continuous strong reflection can cover a whole basin.Finally

the types and abundances of organic matter in source rocks and their physical and chemical processes in hydrocarbon generation should be studies.These four problems in sequence stratigraphic study should be paid more attention to in the future.