CALCAREOUS NANNOFOSSILS AND CHEMOSTRATIGRAPHY OF THE EARLY APTIAN OCEANIC ANOXIC EVENT 1A FROM NORTHERN IRAQ

Authors

  • Falah A. Al-Miamary Geology Department, College of Science, University of Mosul, Mosul, Iraq
  • Omar A. Al-Badrani Geology Department, College of Science, University of Mosul, Mosul, Iraq
  • Ali I. Al-Juboury Geology Department, College of Science, University of Mosul, Mosul, Iraq

DOI:

https://doi.org/10.26842/binhm.7.2020.16.1.0095

Abstract

   Calcareous nannofossils were documented from the upper part of the Cretaceous Balambo Formation in northern Iraq with the aim of determining an evidence for the Oceanic Anoxic Event. A detailed investigation of the calcareous nannofossils led to the identification of twenty-four species. Regarding these data, Discolithus litterarius (Górka, 1957) was identified at the studied interval with the age of Early Aptian.

   Early Aptian assemblages are dominated by nannoconids that drop sharply within the D. litterarius nannofossil zone, which may be related to the nannoconid crisis recorded in the Early Aptian in the other parts of the world. This event is coincided by a decrease in CaCO3 content and higher content of the Total Organic Carbon (TOC).

Received Date: 11 March 2020

Accepted Date: 31 May 2020

Downloads

Download data is not yet available.

Downloads

Published

2020-06-24

Issue

Vol. 16 No. 1 (2020)

Section

Original Articles