The carbon isotopic (delta(13)C) composition of bulk carbonate sediments deposited off the margins of four carbonate platforms/ramp systems (Bahamas, Maldives, Queensland Plateau, and Great Australian Bight) show synchronous changes over the past 0 to 10 million years. However, these variations are different from the established global pattern in the delta(13)C measured in the open oceans over ...

the asmari formation is a thick carbonate sequence in zagros foreland basin. it was deposited during oligocene – early miocene ages. in order to interpret the depositional environment and sequence stratigraphy, firuzabad section were compared with 4 sections of asmari formation in the zagros basin. four different sub environments were identified in the asmari formation based on microfacies anal...

Phosphorus is essential for cell biology, yet scarce in modern marine environments wherein free phosphate consumed by life or titrated calcium to form apatite minerals. The environmental conditions under which the early biosphere emerged and phosphorus was integrated throughout biochemistry unknown. We measured concentrations of 2.8–2.5 Ga shallow carbonate facies across six Neoarchean shelf-ra...

Abstract The exposed Middle Eocene (Bartonian) Qurn Formation along Qattamiya—Ain Sokhna district is measured, sampled and microscopically investigated. Besides, the vertical distribution of chemical oxides strontium (Sr) has been determined to identify their petrographic, geochemical characteristics interpret depositional environments. facies analysis (lithofacies, microfacies, biofacies) stud...

this study shows that ichonology can be used to refine sequence stratigraphy as well as to interpret the depositional environment of the kalat formation (upper maastrichtian) in the central kopeh- dagh basin (ne iran), dareh-gaz section. field studies and petrography of these deposits led to recognize four lithofacies and nine subfacies that formed in the tidal flat (lithofacies a), lagoon (lit...

carboniferous corals of sardar formation, in zeludu stratigraphic section (in ozbak kuh mountains) was studied. after selected of 50 specimens of coral fossils, from first band of corals, 9 species belong to 5 genera from rugosa and tabulata corals with late serpukhovian age were identified. these corals are included following species: heritschioides pseudosolitarius, heritschioides vepres, her...