Larger Foraminifera of Middle and Late Cenomanian (Biostrome Association), Southern Iraq

Searching one of the most important reservoirs Cretaceous in Iraq is aim many researchers. The studied sequences are Mishrif Formation southern Iraq. goal to define fauna and design biostratigraphic zoning. Forty genus species were identified as associated with capable reservoir facies (the biostrome). Identification biostrome mainly was Late Cenomanian part studying sequences. Suggested biozones based on eight biomarkers, two which appear disappear together, leading four interval biozones. They are; (1) Nezzazata simplex conica concurrent biozone delineating Middle age. (2) Praealveoilina cretacea Pseudorhapydionian biozone. (3) Praealveolina tenuis Cisalveolina lehneri (4) Chrysalidina gradate Pseudolituonella reicheli Cenomanian.