Planktic foraminifera and biostratigraphy of the shiranish formation, jambour well no.61 kirkuk area, northeastern IRAQ

الملخص EN

Biostratigraphy of the Shiranish Formation is investigated in Jambour Well No.61, Kirkuk area, Northeastern Iraq, which is located about 150 Km Southeast of Kirkuk city.

The lithology of the Shiranish Formation in the studied well is composed of an alternation of marl, marly limestone, and limestone.

The purpose of this paper is to record the planktic foraminiferal species in the studied section and establish the biostratigraphy zones of planktic foraminiferal and correlated them with their equivalent biozones in and outside Iraq in order to determine the age of the studied section.

Eighteen species of planktic foraminifera are described in eighteen samples collected from the studded well.

Both suggest the Late Campanian to Early Maastrichtian age.

Based on the recognized planktic foraminifera, it is subdivided into three biozones these are from base to top : (Globotruncanita elevata - Rosita fornicata biozone, Globotruncana aegyptiaca biozone, and Gansserina gansseri biozone).