Paleoecology of Garagu Formation and the Upper Part of Ratawi Formation (Lower Cretaceous) of Central Iraq

Abstract

Ostracode assemblages from Garagu and Ratawi Formations (Lower Cretaceous) from Makhul-2 (Mk-2) and East Baghdad-1 (EB-1) boreholes were studied in details, leading to the conclusion that Garagu Formation deposited under shallow marine sublittoral environment with normal salinity and warm water, while Ratawi Formation deposited in shallow marine environment with anoxic environments.