Depositional environment of the Bagh-e-Vang Formation – the only occurrence of upper Lower Permian in Iran

Abstract A transgression of the Tethys Ocean occurred in east central Iran, like other areas Ocean, around Yakhtashian/Bolorian (regional chronostratigraphical units corresponding with Artinskian/Kungurian Early Permian) transition. This led to development a carbonate platform that is represented Shirgesht area on northern part Tabas Block by Bagh-e-Vang Formation, which constitutes only known sedimentary unit from late Permian Iran. Field data and thin-section analysis indicate deposition ramp barriers separating lagoonal intertidal mud flats open-marine environment. The overall transgressive indicated presence sediments top barrier sediments.