Biostratigraphy and paleoenvironmental significance of Paleogene foraminiferal assemblages from Dashte Zari area in High Zagros, West Iran

The Paleogene carbonate deposits of Pabdeh and Jahrum formations are widespread from the northwest (Dashte Zari area) to southwest Shahrekord region in High Zagros Mountains Iran record lateral upward transition open marine into shallow water environment. Formation shows a succession pelagic hemipelagic limestone, argillaceous chert. It consists planktonic wackestone, pellet-planktonic mudstone with foraminifera, radiolarian siliceous which accumulated within Foreland Basin. foraminifers assigned Late Paleocene–Late Eocene correspond subtropical tropical Zones P4b–E15. is represented by bioclast-bearing limestone calcarenite. benthic foraminiferal foraminiferal-red algal packstone, bioclast-intraclast packstone deposited platform inter-fingered upper part finally overlies it conformably during Bartonian–Priabonian. Shallowing off-lap relationships basin shrinking, while repeated inter-fingering signals moderate tectonic subsidence. Both disconformably covered Oligocene–Miocene Asmari Formation. Keywords: biostratigraphy, Formation, Zagros, Paleogene, Iran.