BIOSTRATIGRAPHY OF SANTONIAN – MAASTRICHTIAN DEPOSITS FROM SOUTH EAST ISFAHAN (CENTRAL OF IRAN) ON THE BASES OF CALCAREOUS NANNOFOSSILS AND FORAMINIFERA

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BANIASADI M.R.; HADAVI F.; KHOSROTEHRANI KH.; AGHANABATI A.

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Journal: JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY) Year:2009 | Volume:19 | Issue:73 (GEOLOGY ISSUE) Page(s): 31-44

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Title

BIOSTRATIGRAPHY OF SANTONIAN – MAASTRICHTIAN DEPOSITS FROM SOUTH EAST ISFAHAN (CENTRAL OF IRAN) ON THE BASES OF CALCAREOUS NANNOFOSSILS AND FORAMINIFERA

Author(s)

BANIASADI M.R. | HADAVI F. | KHOSROTEHRANI KH. | AGHANABATI A. | Issue Writer Certificate

Keywords

LATE CRETACEOUS DEPOSITESQ3

NANNOFOSSILQ3

FORAMINIFERAQ3

SOUTH EAST ISFAHANQ3

Abstract

Introduction: The biostratigraphy of upper Cretaceous deposits (Santonian – Masstrichtian) regarding to Calcareous NANNOFOSSILs and FORAMINIFERAs in South and SOUTH EAST ISFAHAN have been studied. NANNOFOSSILs from south and SOUTH EAST ISFAHAN had good preservation and high variety. Lithostratigraphic units have different thicknesses that, include marly limestone, shale, and limestone. Fine grained sediments, normally consisting of shale and marly limestone, have the best chance to contain NANNOFOSSILs with respect to their content in calcareous NANNOFOSSILs.Aim: Santonian-Maastrichtian deposits have identified in south and SOUTH EAST ISFAHAN and exact age of beds have determined by using Calcareous NANNOFOSSILs and FORAMINIFERA.Materials and Methods: Method of "Smear slides" was used in preparation of Calcareous NANNOFOSSILs and samples have been studied by using of Microscope (magnifying of 1000 and in same two light of XPL, PPL Microscope). FORAMINIFERAs in these deposits have studied by method of thin sections.Results: In this investigation, twenty-six species and sixteen genera related to the NANNOFOSSILs and twenty species and twelve genera related to the FORAMINIFERA have been recognized. On the base of first occurrence of index species and assemblage zone, eight biozone from Sisingh zonation (1978) and three kinds of assemblage zone from Wynd zonation (1965) was suggested in these areas.Conclusion: Time limit of studied species in the south of the Isfahan determines Santonian – Masstrichtian age for these deposits. On the base of exact studies of paleontology, the abundance and variety of different species at this time could be found in warm climate. The presence of species like Micula prinsii, Micula murus which all are to low latitudes and are useful indexes of Upper Maasstrichtain help us conclude that SOUTH EAST ISFAHAN basin have been located low to middle latitudes.

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APA: Copy

BANIASADI, M.R., HADAVI, F., KHOSROTEHRANI, KH., & AGHANABATI, A.. (2009). BIOSTRATIGRAPHY OF SANTONIAN – MAASTRICHTIAN DEPOSITS FROM SOUTH EAST ISFAHAN (CENTRAL OF IRAN) ON THE BASES OF CALCAREOUS NANNOFOSSILS AND FORAMINIFERA. JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY), 19(73 (GEOLOGY ISSUE)), 31-44. SID. https://sid.ir/paper/70302/en

Vancouver: Copy

BANIASADI M.R., HADAVI F., KHOSROTEHRANI KH., AGHANABATI A.. BIOSTRATIGRAPHY OF SANTONIAN – MAASTRICHTIAN DEPOSITS FROM SOUTH EAST ISFAHAN (CENTRAL OF IRAN) ON THE BASES OF CALCAREOUS NANNOFOSSILS AND FORAMINIFERA. JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY)[Internet]. 2009;19(73 (GEOLOGY ISSUE)):31-44. Available from: https://sid.ir/paper/70302/en

IEEE: Copy

M.R. BANIASADI, F. HADAVI, KH. KHOSROTEHRANI, and A. AGHANABATI, “BIOSTRATIGRAPHY OF SANTONIAN – MAASTRICHTIAN DEPOSITS FROM SOUTH EAST ISFAHAN (CENTRAL OF IRAN) ON THE BASES OF CALCAREOUS NANNOFOSSILS AND FORAMINIFERA,” JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY), vol. 19, no. 73 (GEOLOGY ISSUE), pp. 31–44, 2009, [Online]. Available: https://sid.ir/paper/70302/en

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