Scientific Quarterly Journal of Geosciences

Scientific Quarterly Journal of Geosciences

Calcareous Nannofossils Biostratigraphy of Neyzar Formation in Type Section (Tange-Neyzar)

Document Type : Original Research Paper

Authors
F. Hadavi
A. Pouresmaeil
Dept. Of Geology, Faculty of Science, Ferdowsi University of Mashhad
10.22071/gsj.2018.58170
Abstract
Nannofossils are suitable for biostratigraphical studied since they are aboundant, planktonic, rapidly evolving and largly cosmopolitan, especially in Late Cretaceous.                                                    
According to this, due to the lack of any precise Paleontological study, the nannofossils of Neyzar Formation has been investigated in type locality. This formation consists of thick- bedded glauconitic sandstone,shale and a sandy limestone bed in the upper part. The Neyzar Formation conformably overlies the Abtalkh Formation and is itself conformably overlained by the Kalat formation.  As a result of this study, for the first time, 22 genera and 42 species of nannofossils have been identified. Based on these obtained nannofossils, the section is Late Maasrichtian in age, corresponding to CC25- CC26 (Sissingh,1977) (equivalent to CC25c-CC26a-b, Perch- Nielsen,1985).
Keywords
Biostratigraphy
Neyzar Formation
Type section
Tange-Neyzar
Calcareous Nannoplanktons
References
Burnett, J. A., 1998- Upper Cretaceous in Calcareous Nannofossils Biostratigraphy (ed.Bown, P.R.), PP. 132-199 (Chapman & Hall, London).
Perch-Nielsen, K., 1985a- " Mesozoic Calcareous Nannofossils ". In: Bolli, H. M.; Saunder, J. B.; Perch – Nielsen, K. (Eds) Plankton Stratigraphy. CambridgeUniv. Press. 329-426.
Sissingh,W., 1977- Biostratigraphy of cretaceous calcareous nannoplankton. Geologie en minjbouw,56,37-65.
Scientific Quarterly Journal of Geosciences
Volume 17, Issue 65
Winter 2007
Pages 36-47