Control of Paleomorphology to Sequence and Sedimentary System in South Beir Depression

Abstract:

According to the analysis of the configuration of paleogeomorphology and paleotopography of the margine of South Beir Depression,the paleo slope break belt of South Beir Depression during the development of cretaceous is divided into 5 types which control the formation and distribution of 5 types of sedimentary system.The faulted scarp type controls the development of near shore subaqueous fan system.The steep slope type controls the development of fandeltas and near sublake fan system.The faulted terrace type controls the development of slop fan system.The gentle slope type controls the development of fan delta system.In basinlevel falling stage,the shore sublacustrine fan system is developed on inner basin types of break inslop.

Key words:paleomorpholoy; baselevel; stratigraphic sequence; break inslope; South Beir Depression