The biostratigraphy of the Outer Carpathians is based mainly on ranges agglutinated foraminifera. Species acmes provide opportunity to enhance and support existing biozonations. Assemblages foraminifera from Campanian Eocene various tectonic-structural units were analyzed in terms their qualitative quantitative occurrence. In this stratigraphic interval, 19 species display significantly increas...

The Late Cretaceous is marked by geodynamical changes including Africa-Eurasia convergence that resulted in the narrowing of Tethys Ocean and ophiolite obduction along southern margin various continental blocks eastern Tethys. Geochemical mineralogical analyses were performed on Shahneshin section (Zagros Basin - Tethys), to explore consequences this evolution oceanic circulation, estimate role...

The ultrastructure of the Late Cretaceous (Santonian-?early Campanian) megaspore Glomerisporites pupus and its associated microspores has been examined in an attempt to resolve a number of problems concerning the interpretation of their morphology. The new observations presented are based on an analysis of entire, fragmentary, and thin-sectioned specimens under scanning and transmission electro...

Abstract Understanding the fracture patterns of hydrocarbon reservoirs is vital in Zagros area southwest Iran as they are strongly affected by collision Arabian and Iranian plates. It essential to evaluate both primary secondary (fracture) porosity permeability understand fluid dynamics reservoirs. In this study, we adopted an integrated workflow assess influence various sets on heterogeneous c...

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...

The provenance of Middle Jurassic-Cretaceous sedimentary rocks deposited in the southern Peruvian Arequipa Basin has been investigated based on measurement 41 Sr-Sm-Nd isotopic compositions rocks, 993 U-Pb zircons ages, and 202 Lu-Hf zircon isotope data. Jurassic units are dominated by Brazilian/Pampean Grenville/Sunsas have juvenile to evolved Hf Permian zircons. These consistent with an Easte...

Many palaeobiological analyses have concluded that modern birds (Neornithes) radiated no earlier than the Maastrichtian, whereas molecular clock studies have argued for a much earlier origination. Here, we assess the quality of the fossil record of Mesozoic avian species, using a recently proposed character completeness metric which calculates the percentage of phylogenetic characters that can ...

Isolated small theropod teeth are abundant in vertebrate microfossil assemblages, and are frequently used in studies of species diversity in ancient ecosystems. However, determining the taxonomic affinities of these teeth is problematic due to an absence of associated diagnostic skeletal material. Species such as Dromaeosaurus albertensis, Richardoestesia gilmorei, and Saurornitholestes langsto...