Analysis of Sedimentary Facies and Depositional Environment of the Aghajari Formation, North of Hosseinieh, Andimeshk, Khuzestan Province, Iran

Mallah, Mohamad; Rafiei, Behrouz; Mohseni, Hassan

doi:10.22071/gsj.2026.552988.2229

Analysis of Sedimentary Facies and Depositional Environment of the Aghajari Formation, North of Hosseinieh, Andimeshk, Khuzestan Province, Iran

Articles in Press

Document Type : Original Research Paper

Authors

Mohamad Mallah ¹

Behrouz Rafiei ²

Hassan Mohseni ¹

¹ Department of Geology, Faculty of Sciences, Bu-Ali Sina University, Hamedan, Iran

² Dept. of Geology, Faculty of Science, Bu-Ali Sina Univ., Hamedan-Iran

10.22071/gsj.2026.552988.2229

Abstract

This study investigates the depositional environment of the Aghajari Formation (Upper Miocene–Pliocene) in the Hosseinieh area of Andimeshk. Three stratigraphic sections—Pa-Alam, Khoshab, and Pirvali—were examined. The Aghajari Formation in the study area exceeds 500 m in thickness and comprises sandstone, siltstone, mudstone, and shale. Field investigations led to the identification of 11 lithofacies, including six sandstone facies (Sp, St, Sm, Sh, Sr, Sfl), two mudstone facies (Fm, Fl), one carbonate facies (bioclastic wackestone), one gray shale facies, and one ichnofacies (Skolithos). The Pa-Alam section displays features characteristic of a deltaic environment, with subaqueous facies representing distributary mouth bars, delta front, and prodelta deposits, and subaerial facies corresponding to delta channels and delta plain deposits. These facies compose the lower part of the Aghajari Formation, whereas the upper part shows features of a meandering river system. The tabular geometry and lateral continuity of sandy facies, extending over several tens of meters, suggest the presence of mouth bars distributed along sandy shorelines under the influence of wave activity. The Khoshab and Pirvali sections, in contrast, were deposited entirely in a meandering river environment

Keywords

Depositional Environment

Delta

Meandering River

Aghajari Formation

Andimeshk

Subjects