Biostratigraphy of Planktic Foraminifera of Serikagni Formation (Lower Miocene) in Sfaya well No.16/North Western Iraq

Abstract

Planktonic Formaninifera is studied from Serikagui Formation in Sfaya well No.16 between the depth interval (630-780)m. Four Biostratigraphic Zones recognized in these stratigraphy succession. These are : form top to bottom .1. Globigerinoides trilobus – Globigerinoides sicanus Partial Range Zone2. Catapsydrax stainforthi – Catapsydrax unicavus Concurrent Range Zone.3.Globoquadrina dehiscens praedehiscens – Globoquadrina dehiscens dehiscens Partial Range Zone.4. Globigerinoides quadrilobatus primerdius – Globorotalia (Turborotalia) kugleri Concurrent Range Zone.These Biostratigraphic Zones are correlated with other Zonal schemes inside and outside Iraq . The age of Serikagni Formation is Lower Miocene.