عنوان مقاله [English]
In this study, biostratigraphy and palaebathymetry Gurpi Formation in section Anticlin Sultan were studied. The thickness of Gurpi Formation in this section is 270 meters and its main lithology includes Marl, Limy Marl, Limestone and Shale. In this section Lower boundary of Gurpi Formation is transition with Ilam Formation , and its upper boundary with Amiran Formation is unconformably. Here, on the basis of foraminiferal studies,45 species belonging to 20 genera of planktonic foraminifera and Benthic were identified. Based on the stratigraphic distribution of the well known foraminifers, seven foraminiferal biozones were established in the Gurpi Formation including Globotruncana elevata zone, Globotruncana ventricosa Zone, Radotruncana calcarata Zone , Globotruncanella havanensis Zone , Globotruncana aegyptiaca Zone , Gansserina gansseri Zone , Contusotruncana contusa Zone . The age of Gurpi Formation in this examined is determined based on identified biozones of Early Campanian to Late Maastrichtian. A depth of 500- 650 m was assigned for most parts of the sediments Gurpi Formatan was assigned ccording to planktonic/epibenthic ratio and Percentage Morphotype 3 and the regression equation D = e (3.58718 (0.03534 × %P)).