BIOSTRATIGRAPHY & PALEOENVIROMENT OF THE QOM FORMATION IN NORTHEAST OF MAHNESHAN

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DANESHIAN J.; SHAHRABI M.; AKHLAGHI M.

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Journal: GEOSCIENCES Year:2010 | Volume:19 | Issue:76 Page(s): 45-50

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Title

BIOSTRATIGRAPHY & PALEOENVIROMENT OF THE QOM FORMATION IN NORTHEAST OF MAHNESHAN

Author(s)

DANESHIAN J. | SHAHRABI M. | AKHLAGHI M. | Issue Writer Certificate

Keywords

CENTRAL IRANQ2

MAHNESHANQ2

EARLY MIOCENEQ3

BIOSTRATIGRAGHYQ2

PALEOENVIRONMENTQ2

FORAMINIFERAQ2

QOM FORMATIONQ2

Abstract

75 samples of the QOM FORMATION in Andabad, northeast MAHNESHAN, were investigated. The QOM FORMATION in the examined section with a thickness of 301m, mainly consists of limestone and marl, and disconformably overlies the Lower Red Formation and lies under the sediments of the Upper Red Formation. A study of FORAMINIFERA was led to identifying 42 genera and 70 species of the benthonic and plankthonic FORAMINIFERA, which 37 genera and 57 species is reported from this area for the first time. Among them, benthonic FORAMINIFERA have more varieties and abundances, and used for BIOSTRATIGRAGHY. Based on the identified FORAMINIFERA, the Andabad section is comparable to Assemblages Zone 1 and 2 introduced by Adams and Bourgeois. On the basis of occurrence of the index FORAMINIFERAl species and their stratigraphic distribution, the age of the QOM FORMATION in the studied section is EARLY MIOCENE (Late Aquitanian to Burdigalian).The assemblage, abundance, and species diversity of FORAMINIFERA in the examined samples shows noticeable changes in the PALEOENVIRONMENTal conditions. The maximum diversity of FORAMINIFERA is sixteen species. Based on species diversity, the strata classified to nine assemblages A to I. The abundance of FORAMINIFERA in each assemblage indicates that the sediments of the QOM FORMATION belong to inner shelf environments.

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APA: Copy

DANESHIAN, J., SHAHRABI, M., & AKHLAGHI, M.. (2010). BIOSTRATIGRAPHY & PALEOENVIROMENT OF THE QOM FORMATION IN NORTHEAST OF MAHNESHAN. GEOSCIENCES, 19(76), 45-50. SID. https://sid.ir/paper/32346/en

Vancouver: Copy

DANESHIAN J., SHAHRABI M., AKHLAGHI M.. BIOSTRATIGRAPHY & PALEOENVIROMENT OF THE QOM FORMATION IN NORTHEAST OF MAHNESHAN. GEOSCIENCES[Internet]. 2010;19(76):45-50. Available from: https://sid.ir/paper/32346/en

IEEE: Copy

J. DANESHIAN, M. SHAHRABI, and M. AKHLAGHI, “BIOSTRATIGRAPHY & PALEOENVIROMENT OF THE QOM FORMATION IN NORTHEAST OF MAHNESHAN,” GEOSCIENCES, vol. 19, no. 76, pp. 45–50, 2010, [Online]. Available: https://sid.ir/paper/32346/en

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