Note on cretaceous transgressive peaks and their relation to geodynamic events for the Arabo-Nubian and the Northern African shields

The major tectono-eustatic transgressions of the Cretaceous Period (Aptian, Albian, Cenomanian, Coniacian-Santonian, Campanian and Maastrichtian-Paleocene) are related to a gamut of specific megatectonic events - seafloor-spreading, accretion of mid-oceanic ridges, volcanism and uplift in the Middle East (Arabo-Nubian shield) and the North African shield. These six transgressive peaks fit almost exactly the global maxima of advances of the ocean. It is emphasized that the successful correlation of events cannot be achieved by means of any of the absolute time-scales available owing to the arbitrariness of these at present; hence, the zonal scheme based on ammonites has been used for correlational purposes.