الملخص

Seventy eight planktic foraminiferal species and subspecies were recorded from the Jaddala Formation in some selected wells in western Iraq. On the basis of the stratigra-phic ranges of the recorded foraminifera, the studied sequence is attributed to the Morozovella formosa formosa, Acarinina pentacamerata, Acarinina bullbrooki, Globigerinatheka subconglobata subconglobata, Acarinina rotundimarginata, Hantkenina alabamensis, Truncorotaloides rohri rohri, Globigerinatheka mexicana mexicana and the Turborotalia cerroazulensis cerroazulensis Zones. The present investigation indicates that the Jaddala Formation is upper Early-Late Eocene in age. ــــــــــــــــــــــــــــــــــــــــــــــــــــــ