Biostratigraphy of the Tarbur Formation, Zagros Basin and introduction of its rudists

Tarbur Formation is a predominatly carbonate lithostratigraphic unit that crops out in Zagros Basin, between the main Zagros reverse fault, high Zagros and east of Sabzpushan fault. This Formation was studied from biostratigraphic point of view at four measured sections (Robut, Chamsangar, Balghar and Sarvestan). Microbiostratigraphical data is mainly based on foraminifera which indicate Early- Middle Maastrichtian for this formation at Sarvestan and Middle Maastrichtian for Balgar, Robat and Chamsangar sections.