Outcrop and microscopic studies have been applied in this research paper in order to find out the Asmari Formation depositional sequences in the Shajabil Anticline section located at the north of the Izeh Zone, Zagros Basin, Iran. Five depositional sequences were identified based on 11 facies types (bioclast Nummulitidae Lepidocyclinidae packstone, bioclast perforate foraminifera Nephrolepidina Miogypsinoides wackestone-packstone, bioclast perforate foraminifera Corallinacea wackestone-packstone, bioclast echinoid Neorotalia Brachiopoda wackestone-packstone, coral floatstone-rudstone, bioclast Corallinacea imperforate foraminifera wackestone-packstone, bioclast imperforate foraminifera Archaias wackestone-packstone, bioclast imperforate foraminifera Dendritina wackestone-packstone-grainstone, bioclast imperforate foraminifera Borelis wackestone-packstone and very fine sandy mudstone) corresponding to the tidal flat, restricted and semi-restricted lagoon and open marine environments of an inner and middle shelf areas.