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Paper Information

Journal:   GEOSCIENCES   SUMMER 2007 , Volume 16 , Number 64; Page(s) 126 To 135.
 
Paper: 

STUDY OF PLANKTONIC FORAMINIFERA AND BIOZONATION IN ABDERAZ FORMATION

 
 
Author(s):  BAKHSHANDEH L., AGHA NABATI SEYED ALI, KESHANI F., MOHTAT T.
 
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Abstract: 

To revise the Abderaz Formation in Koppeh-Dagh basin, its type section was studied considering stratigraphical properties. The main lithology of Abderaz Formation includes gray to blue shale with a thickness of 286.86 meters. This Formation has an attitude of N 45o W and 80o SW. Its lower boundary with Aitamir Formation is unconformable and upper boundary with Abtalkh Formation conformable.
In this study, 58 planktonic species of 26 genuses were identified and presented. The age of Abderaz Formation, based on the identified planktonic foraminifera, was determined from Early Turonian to Early Campanian. Planktonic foraminifera fossils found in Abderaz Formation are more abundant than benthic foraminifera ones that show deep sea and continental slope environment.
Regarding the foraminifera content of the Abderaz Formation, 7 biozones were determined in the Mozduran section (Kopeh-Dagh) which shows Early Turonian – Early Campanian age for Abderaz Formation.

 
Keyword(s): ABDERAZ FORMATION, CENTRAL IRAN, KOPEH DAGH, EARLY TURONIAN, EARLY CAMPANIAN, BIOZONE
 
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