calcareous nannofossils in boundary of tirgan and sarcheshmeh formations at qalezo section have been studied. this section is situated in the west of kopet-dagh basin. in this study 35 nannoplankton species of 17 genera were identified. according to the first occurrence of index species and fossil assemblages two calcareous nannofossil biozones (cc7-cc8) of sissingh (1997) have been recognized....

this study presents the nannostratigraphy and nannofossil events in the lower boundary of kalat formation in the east and west of the kopeh- dagh basin. the kalat formation comprises of coarse grained detritus limestone with subordinate sandstone intercalations. in the current study, six sections have been chosen in the east and west of the basin which are as follow: dobaradar section, kalat se...

The specified systematic study of calcareous nannofossils was carried out on successions Shiranish and Aaliji Formations. Four Samples have taken from (Kh-4) well, between (2600-2630) m, Northern Iraq. Twenty-five species were identified. According to the identified taxa, two biostratigraphic biozones determined, oldest youngest: 
 1- Rienhardtites lives Interval Biozone (CC24) Part. 2- Fa...

The concept of a geologically instantaneous earliest Zanclean reflooding the Mediterranean Basin after Messinian drawdown has dominated geological thinking and is ingrained in scientific literature. base Trubi Formation southern Italy, formally defined as Global Boundary Stratotype Section Point (GSSP) at 5.33 Ma, traditionally been considered marking marine Mediterranean. However, several stud...