Biostratigraphy of the Gurpi Formation in Kuh-e-Sefid Section, East of Ramhormoz

Rahimi, S; Sadeghi, A; Partoazar, M.R

doi:10.22071/gsj.2015.42555

Biostratigraphy of the Gurpi Formation in Kuh-e-Sefid Section, East of Ramhormoz

Document Type : Original Research Paper

Authors

S Rahimi ¹

A Sadeghi ²

M.R Partoazar ³

¹ M.Sc., Department of Geology, Faculty of Earth Sciences, Shahid Beheshti University, Tehran, Iran

² Assistant Professor, Department of Geology, Faculty of Earth Sciences, Shahid Beheshti University, Tehran, Iran

³ Ph.D. Student, Department of Geology, Islamic Azad University, Science and Research Branch, Tehran, Iran

10.22071/gsj.2015.42555

Abstract

In this research, the biostratigraphy of the Gurpi Formation in Kuh-e-Sefid section in east of Ramhormoz is studied. The thickness of the Gurpi Formation is 190.5m and consists mainly of shale, argillaceous limestone and marl. The lower boundary with the Ilam Formation is comformable with sharp lithology and upper boundary with the Pabdeh Formation is unconformable with a gap between Late Maastrichtian and Late Paleocene. In this study, 47 species belonging to 17 genera and 8 biozones of planktonic foraminifera were recognized. The biozones consist of Dicarinella asymetrica zone, Globotruncanita elevate zone, Globotruncana ventricosa zone, Radotruncana calcarata zone, Globotruncanella havanensis zone, Globotruncana aegyptiaca zone, Gansserina gansseri zone, and Racemiguembelina fructicosa zone. The age of the Gurpi Formation based on these biozones is Late Santonian to Late Maastrichtian in this section.

Keywords

Biostratigraphy

Gurpi Formation

Planktonic Foraminifera

Kuh e Sefid section

Ramhormoz