Paleoecology of the Sachun formation succession around Maharlu Lake, east of Shiraz

For investigating the paleoecology of the Sachun Formation in the Interior Fars Zone, Dariyan and Kuhenjan sections in the east of Shiraz and around Maharlu Lake have been selected. The deposits of the Sachun Formation in this area are generally composed of limestones and sandy limestones. The Sachun Formation overlies Pabdeh Formation in both sections and is overlain by deposits of Jahrum Formation conformably. Biostratigraphic data based on benthic and planktic foraminfera and calcareous algae indicate Lower Paleocene to Lower Eocene age for the respected sequence. The abundance have a specific range size of different of foraminifers species using Miliolids and Rotalids on these unstable conditions and lack of calcareous algae and foraminifers such as Orbitolites sp. Lithophyllum sp. is used in this area to raise shore in the Qorban Member, followed by the study of eutrophic conditions in the middle and lower Sachun Formation. Facies and biostratigraphic evidence indicate that depositional environments of the Sachun Formation was deeper in the study area than the type section in southern Fars zone.