Microbiostratigraphy of the Tarbur Formation, Zagros Basin, Iran

Abstract

The Tarbur Formation is a predominately carbonate lithostratigraphic unit that outcrops in Zagros basin, between main Zagros reverse fault and high Zagros and east of Sabzpushan faults. This Formation was studied from microbiostratigraphic point of view at four measured sections, in the north of Khorram Abad (Robat section) in the east of Khorram Abad (Chamsngar section) in the east of Shirz (Sarvestan section) and in the south east of Semirum (Balghar section). Microbiostratigraphical data mainly based on foraminifera which among them, species of Loftusia have more variety and abundance, so the species of Loftusia from the measured sections are used to determine the age of successions. It is analogous to Omphalocychis-Loftusia assemblage /one but according to the distribution of the index species of Lofiusia the age of Tarbur Formatoin is Early-Middle Maastrichtian at Sarvestan section and Middle Maastrichtian for Balgar, Robat and Chamsangar sections. © 2009 Asian Network for Scientific Information.