THE GLOBAL UPPER CRETACEOUS SCALE

Abstract

The global stratigraphic scale of the Upper Cretaceous biozonation is considered. The presented version is based on stage boundaries of the Cretaceous System proposed by the International working groups and discussed at the Second International Symposium in Brussels (1995). For maximum convenience, the scale includes several zonations of different orthostratigraphic faunal groups: ammonites, planktonic foraminifers, and calcareous nannoplankton. In addition, the scale is supplemented with the magnetostratigraphic scheme and radiological dates of stage boundaries. The scale can serve as a reliable tool for correlation of the Cretaceous regional subdivisions in different regions of Russia.