Open Journal of Geology, ( ISI ), Volume (3), No (1), Year (2013-1) , Pages (33-38)

Title : ( Biostratigraphy and Mass Extinction Pattern across the Cretaceous/Paleogene Boundary, Northern Alborz, Iran )

Authors: Masoud Asgharianrostami , Mohammad Vahidinia , ابراهیم قاسمی نژاد , عباس صادقی ,

Citation: BibTeX | EndNote

Abstract

High resolution sampling across the Cretaceous/Paleogene boundary (K/Pg) at the Galanderud section in northern Iran provides the most expanded and continuous section for us to consider biostratigraphy and the mass extinction pattern of Cretaceous planktic foraminifera. Based on planktic foraminifera, four biozones and five sub-biozones have been iden- tified across the K/Pg boundary. These biozones include the Abathomphalus mayaroensis Biozone (Plummerita hant- keninoides subbiozone), the Guembelitria cretacea Biozone (including two sub-biozones: the Hedbergella holmdelensis and the Parvularugoglobigerina longiapertura), the Parvularugoglobigerina eugubina Biozone (including two subbio- zones: the Parvularugoglobigerina Sabina and the Eoglobigerina simplicissima) and finely the Parasubbotina pseu- dobulloides Biozone. Planktic foraminiferal extinction occurred over a brief period, with 3% of the species disappearing in the late Maastrichtian, and 72% of the species becaming extinct at the K/Pg boundary. About 25% of the species sur- vived into the early Danian. Extinction of 73% of the species at the K/Pg boundary is very compatible with the effect of a large asteroid impact.

Keywords

Biostratigraphy; Mass Extinction Pattern; Cretaceous/Paleogene Boundary; Northern Alborz; Iran
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@article{paperid:1032169,
author = {Asgharianrostami, Masoud and Vahidinia, Mohammad and ابراهیم قاسمی نژاد and عباس صادقی},
title = {Biostratigraphy and Mass Extinction Pattern across the Cretaceous/Paleogene Boundary, Northern Alborz, Iran},
journal = {Open Journal of Geology},
year = {2013},
volume = {3},
number = {1},
month = {January},
issn = {2161-7570},
pages = {33--38},
numpages = {5},
keywords = {Biostratigraphy; Mass Extinction Pattern; Cretaceous/Paleogene Boundary; Northern Alborz; Iran},
}

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%0 Journal Article
%T Biostratigraphy and Mass Extinction Pattern across the Cretaceous/Paleogene Boundary, Northern Alborz, Iran
%A Asgharianrostami, Masoud
%A Vahidinia, Mohammad
%A ابراهیم قاسمی نژاد
%A عباس صادقی
%J Open Journal of Geology
%@ 2161-7570
%D 2013

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