TITLE:
Investigation of the Boundary between Abderaz and Kalat Formations Based on Calcareous Nannofossils in West Kopet-Dagh (NE IRAN)
AUTHORS:
Mohammad Anvar Moheghy, Fatemeh Hadavi, Behname Rahimi
KEYWORDS:
Nannofossils; Biostratigraphy; Abderaz; Kalat; Iran; Kopet Dagh
JOURNAL NAME:
Open Journal of Geology,
Vol.3 No.3,
July
4,
2013
ABSTRACT: The biostratigraphy of calcareous nannofossils of the Cretaceous is investigated in the boundary between Abderaz and Kalat Formations
through the record of species richness, diversity and distribution patterns in
the west Kopet-Dagh region. The Kalat Formation comprising
of coarse-grained detritus limestone with subordinate sandstone intercalations
and the Abderaz Formation mainly consists of limestone, Shale and Limy marl.
Nannofossils of this boundary in each of studied sections are listed and figured. 21 species inGhalehzoo section, 29
species in Sheikh section and 19
species in Jozak section have been determined. Boistratigraphy based on calcareous nannofossil allow the
identification of nannofossil standard zones CC21 and CC26 in all of sections,
According to these zones in all of sections, the age of the studied thickness
is Early Late Campanian-Late
Late Maastrichtian in these sections.