alexa Biostratigraphic Revision of Middle-Cretaceous Succession in South Zagros Basinand#160;(SW of Iran) | OMICS International| Abstract
ISSN: 2157-7617

Journal of Earth Science & Climatic Change
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  • Research Article   
  • J Earth Sci Clim Change 2014, Vol 5(8): 216
  • DOI: 10.4172/2157-7617.1000216

Biostratigraphic Revision of Middle-Cretaceous Succession in South Zagros Basin (SW of Iran)

Massih Afghah*, Arash Yousefzadeh and Somayeh Shirdel
Geology Department, Islamic Azad University, Shiraz Branch, Shiraz, Iran
*Corresponding Author : Massih Afghah, Geology Department, Islamic Azad University, Shiraz Branch, Shiraz, Iran, Tel: +098-917-313-6, Email: [email protected]

Received Date: May 20, 2014 / Accepted Date: Aug 21, 2014 / Published Date: Aug 30, 2014

Abstract

Cenomanian succession (Sarvak Formation) is well distributed along Zagros area particularly in the south portion of the Zagros (Fars area). This study attempts to determine the precise biostratigraphic biozones of four stratigraphic sections selected from the Cenomanian strata south Zagros basin, including the sections of Nour Abad, Samghan, Doroodzan, and Arsanjan. The vertical distribution of the index foraminifers confirms a faunal assemblage of benthic and planktic foraminifers in the mentioned stratigraphic sections. The received Biostratigraphic data of this work reveals well developed benthic foraminifers and well distributed Cenomanian planktons in the uppermost lithostratigraphic part of the studied Sarvak exposures. However, the established biozones of the Sarvak Formation represent the Cenomanian age, which is similar to many recognized Cenomanian biozones in the Tethyan realm, whereas the foraminiferal biostratigraphy of the Arsenjan stratigraphic column is assigned to the Late Albian to Early Cenomanian age. Since benthic foraminifers are well expanded in studied section of Sarvak Formation, the presence of pelagic biofacies is a proof of transgression in some studied sections. However, the established biozones support that geologic setting is the most factor which controls vertical distribution of foraminifers and other microfossils during the deposition of Sarvak Formation. The received biostratigraphic data of the Sarvak Formation determines subdivision of Cenomanian age in the South Zagros basin clearly.

Keywords: Biostratigraphy; Foraminifera; Cenomanian; Zagros; Iran

Citation: Afghah M, Yousefzadeh A, Shirdel S (2014) Biostratigraphic Revision of Middle Cretaceous Succession in South Zagros Basin (SW of Iran). J Earth Sci Clim Change 5: 216. Doi: 10.4172/2157-7617.1000216

Copyright: ©2014 Afghah M, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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