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نمایش تعداد 1-10 از 18
Calcareous nannofossils in Upper Cretaceous deposits at the boundary of the Aitamir-Abderaz Formations in Do-Baradar section (Kopet-Dogh rang, NE Iran)
The most complete Cretaceous succession in northern Iran can be found in Kopet-Dogh Basin. The Aitamir Formation is located in eastern Kopet-Dogh and is composed mainly of lower sandstone and upper shale. The Abderaz ...
Late Cretaceous calcareous nannofossils from the Sefidchah section in eastern Alborz, N. Iran
, but there are no reports on the nannoplankton. Therefore, a total number of 20 samples were taken for the determination of calcareous nannofossils. The nannofossils are moderately preserved and diverse. As a result of this study, for the first time, 20 genera and 37...
Calcareous nannofossils from the Abtalkh and Neyzar Formation boundary, Kopet-Dogh range, N.E. Iran
. These deposits mainly consist of 40 m of calcareous shales bluish gray marls, and a sandy limestone layer. Most previous calcareous nannofossil studies have been carried out by Hadavi and colleagues (Hadavi & Khodadadi, 2002; Hadavi et al., 2004). The top...
Late Cretaceous calcareous nannofossils from chalky limestone of southern Kordkuy (eastern Alborz), N. Iran
and rudists. For the first time the calcareous nannofossils in this area were studied.
For this purpose we took 23 samples for examination. The nannofossils are moderately to poorly-preserved and diverse. As a result of this study, 14 genera and 26...
Calcareous Nannofossils in Holocene Surface Sediments of the Persian Gulf
events on some species of calcareous nannofossils. For this reason, 17
samples of surface sediments of the Persian Gulf were studied. Preservation of calcareous nannofossils in
surface sediment samples was good and the dominant species were...
Biostratigraphy and paleoecology of Cretaceous rocks based on calcareous nannofossil in Sarayan section, East Iran
Calcareous nannofossil assemblages reecovered from a long, continuous section have been described from the Sarayan region in Lut Block in east Iran. the marine Upper Cretaceous sediments of this section yield medium diverse and well- preserved...
Changes in productivity in the boundary between Abderaz and Abtalkh Formations (East Kopet Dagh, NE Iran) evidenced by calcareous nannofossils and elements (Zn, Cu, Cd, Pb and CaCO3)
understand the factors that controlled sedimentation, ten samples were analysed for calcareous nannofossils
and Zn, Cu, Cd, Pb and CaCO3 composition from the boundary between Abderaz Formation and Abtalkh Formation in Hammam Qaleh section of the Kopet...
Calcareous nannofossil biostratigraphy of Campanian strata (Abtalkh Formation) from the eastern Koppeh-Dagh Basin, NE Iran
to 1750 m in the area. The formation is characterized by abundant,
diverse, and poor to moderately well preserved calcareous nannofossil assemblages of Tethyan affinity.
The assemblages were studied in detail in two sections in eastern Koppeh...
Calcareous nannofossil biostratigraphy of the Qom Formation in Central Iran
units (members a to f), is important for oil and gas
exploration. The purpose of this study was to identify the
calcareous nannofossils in this formation in the Navab and
Shurab sections of central Iran. Nannofossil assemblages
were well preserved...
Calcareous nannofossils from chalky limestone intervals of the Abderaz formation in the Kopet Dagh range, NE Iran
A biostratigraphic study based on calcareous nannofossils was performed on the chalky limestone from the Abderaz Formation in the Mozduran section (Kopet Dagh basin, NE Iran). Semiquantitative estimates of total nannofossil and single species...