A Detailed Calcareous nannofossil study conducted on the Bekhme Formation that is cropped out at Southern limb of Bekhere anticline, eastern ward Dohuk city near Bajlur village, northern Iraq. The composed marly limestone, Organic limestone and fossiliferous limestone. nannopaleontological classification these calcareous nannofossils led us to determine thirty-four genus/species belonging nine ...

The Upper Cretaceous deposits of northwestern Colombia accumulated in two regions with distinct tectonic settings. eastern deposits, consisting Turonian–Maastrichtian rocks from the Magdalena Valley (UMV) and Cesar-Rancheria basins, were deposited by an epicontinental sea that partially covered South American Plate. In contrast, western which comprise a series highly faulted folded Coniacian–Ma...

This study reconsiders the previous biostratigraphic settings for Asmari Formation in eastern Zagros Basin (Fars Basin). The results imply that Rupelian is identified by total range zone of Nummulites species (N. vascus, N. fichteli, intermedius). occurrence Archaias kirkukensis, A. hensoni, and asmaricus before disappearance current even co-occurrence hensoni with mentioned prevents use recent...

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...

Four supergiant and numerous giant gasfields have been discovered in the Southwest Iran which produce from Permian-Triassic carbonates belong to the upper member of Dalan Formation and Kangan Formation. In this research a detailed biostratigraphic, microfacies and sequence stratigraphic study of the late Middle Permian to Triassic successions was undertaken from 850 thin sections prepared from ...

It is the first time that biostratigraphic zonations of calcareous nannoplankton from Maestrichtian to Lower Tertiary deposits of Iran are reported. The required samples from the north-eastem and western parts of the country were selected from the stocks of the National Iranian Oil Company. Taxonomic descriptions were not the main objectives, although a new species and genus are apparently ...

The biostratigraphic distribution of orbitolinids for the Barremian SE France proposed hereafter is calibrated on ammonite biozonation. This work based study eleven sections with associated to macrofossils (ammonites and/or echinids) significant in terms biostratigraphy or overlain levels bearing above macrofossils.