New biostratigraphy and microfacies analysis of Eocene Jahrum Formation (Shahrekord region, High Zagros, West Iran). A carbonate platform within the Neo-Tethys oceanic realm

The Eocene Jahrum Formation in High Zagros was studied Kuh-e- Soukhteh and North Gahrou sections (southwest of Shahrekord region, Chahar-mahal Bakhtiari Province). This formation, composed limestone, marl, dolomitic limestone (dolostone), accumulated on a marine platform within the Neo-Tethys ocean realm. It yields rich foraminiferal fauna, which three larger benthic assemblage zones were identified. Two section correlated to Ypresian Bartonian, one zone is represented assigned Bartonian. In addition, other groups associations have been identified based test wall type (porcellaneous, agglutinate, hyaline) paleogeographical significance. A discontinuity marked by hiatus from Cuisian Lutetian most probably due concealed fault. According microscopic textures distribution foraminifera components (peloids, intraclasts, etc.), gentle depth gradient inner ramp proximal outer may be reconstructed.