Biostratigraphic Interpretation and Systematics of Some Alveolina Species Assemblages in the Ziarat Formation from Soltanieh Mountains  (Western Alborz)

Hadi, M; Mosaddegh, H; Abbassi, N

doi:10.22071/gsj.2015.42254

Biostratigraphic Interpretation and Systematics of Some Alveolina Species Assemblages in the Ziarat Formation from Soltanieh Mountains (Western Alborz)

Document Type : Original Research Paper

Authors

M Hadi ¹

H Mosaddegh ²

N Abbassi ³

¹ Ph.D. Student, Department of Geology, Ferdowsi University of Mashhad, Mashhad, Iran

² Associate Professor, Department of Geology, Faculty of Earth Sciences, Kharazmi University, Tehran, Iran

³ Associate Professor, Department of Geology, Faculty of Sciences, Zanjan University, Zanjan, Iran

10.22071/gsj.2015.42254

Abstract

Carbonate successionsof the Ziarat Formation with introduce the Baghdareh and Gheynarjehsections in the Soltanieh Mountains(southern Zanjan) are rare locality in the western Alborzzone,which are contains of great abundance oflarge benthic foraminifera (LBF), particularly species of Alveolina. In fact, from this succession described some of Alveolinaspecies and their comparative stratigraphic distribution with the Alveolina species in the Tethyanbasinwhich is represent close affinitieswith coeval Alveolinaassemblages described in diVerent studies from this province. Also, this correlation shows Ilerdian-Cusianstages of study area that characterized by A. ellipsoidalis, A. laxa, A. tumida, A.cemali, A.aragonensis, A. pisiformis,A.rotundata, A.subpyrenaica, A. cf. canavari, A. canavari, A.ex gr. cremae species.

Keywords

Alveolina

Ilerdian-Cuisian

Biostratigraphy

Ziarat Formation

Soltanieh Mountains