Том: 36 , Год издания: 1994

This first attempt to combine biostratigraphic and sequence stratigraphic analyses in northern Siberia has resulted in correlations of variable precision and detail in the Upper Cretaceous. The biostratigraphy of northern Siberia can be defined on the basis of exposed Upper Cretaceous outcrops near the mouth of the Yenisei River and Pyasina River basin. This section provides the most detailed and complete stratigraphic framework available in the Boreal realm of Eastern Europe and Siberia. The Upper Cenomanian, Turonian, Coniacian, and Santonian sections provide very detailed biostratigraphy as well as sequence stratigraphy, with resolution of zones, sequences, and parasequences usually better than 1 m.y. The resolution of the Campanian and Maastrichtian is less, both sequence and biostratigraphically, often exceeding 1 m.y. On the basis of Northern Siberian stratigraphy, seven sequences have been identified in the Upper Cenomanian through Santonian. These correlate closely to sequences found in Western Europe and North America. Campanian and Maastrichtian sequences also can be correlated with the West, but because there are only two of them, the resolution is less. Likewise, in the lower part of the section there is a detailed zonation of inoceramids, but the upper part of the section is poorly controlled. The Siberian sequence and biostratigraphy readily can be correlated with that of the Russian Platform, and sets the stage for the development of a detailed quantified eustatic sea level curve. The correlation of northern Siberian biostratigraphy with Tethyan counterparts is more problematic. This is the subject for additional future research, and it is anticipated on the basis of our preliminary results that sequence stratigraphic correlation will be a generally useful tool in supplementing biostratigraphic correlation.