APPLICATION OF ECOSTRATIGRAPHY TO SEQUENCE-STRATIGRAPHY

The results of ecostratigraphy can directly serve sequence stratigraph y. The habitat type curve is useful not only in the analysis of sequen ces and parasequences, but also in demonstration of the process of reg ional sea level change. The various biological surfaces usually coinci de with or relate to the boundaries of sequences or system tracts. The ecostratigraphic framework composed of coenozones, community sequence s and ecotracts with good timing completely corresponds to the sequenc e stratigraphic framework of the sedimentary basin. Therefore, through establishment of the habitat type curve in individual section, recogn ition of the various biological surfaces, regional ecostratigraphic co rrelation and the formation of an ecostratigraphic framework of the se dimentary basin, ecostratigraphy plays an important role in the study of sequence stratigraphy and the reconstruction of regional and even g lobal sea level changes.