the kopet-dagh basin extended in the north and north east of iran and consists of marine strata from middle jurassic to paleogene time. abtalkh formation is one of the thickest lithostratigraphic units of cretaceous in the kopet-dagh basin and is composed of light gray, green to bluish marl and silty marl. the abtalkh formation conformably overlies the marls and chalky limestones of the abderaz...

Coccolithophores, common primary producers in Mesozoic, Cenozoic, and present oceans, are significant components of the earth’s biogeochemical cycles. Being most productive calcifying organism on earth, their carbonate oozes play a major role fixing CO2, thereby forming important long-term CO2 sink throughout last 100 Ma. Our understanding fossil ancestors is mainly based data from chalk sequen...

Dinosaur fossils from the latest Cretaceous (Campanian–Maastrichtian) of Africa and Arabian Peninsula are rare. Most discoveries to date have consisted limited that precluded detailed phylogenetic paleobiogeographic interpretations. Fortunately, recent such as informative Egyptian titanosaurian sauropod dinosaur Mansourasaurus shahinae beginning address these long-standing issues. Here we descr...

A succession of Late Campanian- Early Maastrichtian is analyzed from Gurpi Formation with regard to the calcareous nannofossils. Correlation Matrix was applied for the first time to the entire nannofossil assemblage to reconstruct environmental conditions. A detailed quantitative calcareous nannofossil analyses is performed on samples in order to further investigate the climate events, and inte...