Biostratigraphy of the Garau Formation in Naft well subsurface stratigraphic section, South Kermanshah

Abstract

In order to biostratigraphy of the Garau Formation in the centeral Lurestan, one subsurface section (Naft well) in Naft anticline, south Kermanshah was selected and studied. The drilled thickness of the Garau Formation in this section is up to 485 meters and lithologically composed of argillaceous limestones and dark gray marls. In this research 1150 thin sections of subsurface Naft well section were studied. In biostratigraphic studies of the Garau Formation in study section 61 species belong to 17 genera of planktonic foraminifera were recognized and 9 biozones were identified. Based on distribution of fossils and biozones identificated, the age of the Garau Formation in drilled part of the subsurface Naft well section is Early Aptian to Early Cenomanian.

Keywords

• Biostatigraphy
• Garau Formation
• Aptian
• Cenomanian
• Kermanshah