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Information Journal Paper

Title

Record bio-events and study the distribution of calcareous nannofossils in Cretaceous-Paleogene sediments, Neo-Tethys Ocean realm

Pages

  69-78

Abstract

 In the present study, the sediments of the Gurpi Formation in the Jafarabad section located in the southeast of Ilam were examined from the point of view of calcareous calcareous nannofossils. The sediments of the upper part of Gurpi Formation with a thickness of about 42 m are composed of limy marl sediments. In this study, 34 species belonging to 22 genera from the group of calcareous nannoplankton were identified. In this formation, based on recorded Bio-events, bio-zones CC25 (UC19TP-UC20aTP) to (CC26 (UC20bTP, UC20cTP, UC20dTP in sediments belonging to the Upper Cretaceous followed by the bio-zone, NP4 (CNP6-CNP7), NP5 (CNP7-CNP8), NP6 (CNP8) were identified from Paleocene sediments in the upper part of the Gurpi Formation. According to the determined bio-zones, the age of the upper part of Gurpi Formation, late Maastrichtian (Cretaceous) to late Selandian (Middle Paleocene) was identified. In the present study, based on the absence of registration of NP1, NP2, NP3 bio-zones and the lack of fossil data, the boundary between Cretaceous and Paleogene in the upper part of this formation is proposed to be discontinuous. In addition, based on the record of Bio-events from the group of calcareous nannofossils, which confirm the warm climate, the conditions prevailing in the sedimentary basin at the time of sedimentation of the Gurpi Formation are inferred with warm climate.

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    • Cite

    APA: Copy

    SENEMARI, SAEEDEH, & SAEEDI RAZAVI, BEHZAD. (2021). Record bio-events and study the distribution of calcareous nannofossils in Cretaceous-Paleogene sediments, Neo-Tethys Ocean realm. JOURNAL OF OCEANOGRAPHY, 12(45 ), 69-78. SID. https://sid.ir/paper/955439/en

    Vancouver: Copy

    SENEMARI SAEEDEH, SAEEDI RAZAVI BEHZAD. Record bio-events and study the distribution of calcareous nannofossils in Cretaceous-Paleogene sediments, Neo-Tethys Ocean realm. JOURNAL OF OCEANOGRAPHY[Internet]. 2021;12(45 ):69-78. Available from: https://sid.ir/paper/955439/en

    IEEE: Copy

    SAEEDEH SENEMARI, and BEHZAD SAEEDI RAZAVI, “Record bio-events and study the distribution of calcareous nannofossils in Cretaceous-Paleogene sediments, Neo-Tethys Ocean realm,” JOURNAL OF OCEANOGRAPHY, vol. 12, no. 45 , pp. 69–78, 2021, [Online]. Available: https://sid.ir/paper/955439/en

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