Title of article :
CALCAREOUS NANNOFOSSILS and CHEMOSTRATIGRAPHYOF THE EARLY APTIAN OCEANIC ANOXIC EVENT 1A FROM NORTHERN IRAQ
Author/Authors :
Al-Miamary, Falah A Geology Department - College of Science - University of Mosul - Mosul, Iraq , Al-Badrani, Omar A Geology Department - College of Science - University of Mosul - Mosul, Iraq , Al-Juboury, Ali I Geology Department - College of Science - University of Mosul - Mosul, Iraq
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. litterariusnannofossil zone, which maybe 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 CaCO3content and higher content of the Total Organic Carbon (TOC).
Keywords :
Aptian , Balambo Formation , Iraq , Nannoconid , OAE1a
Journal title :
Bulletin of the Iraq Natural History Museum
