Scientific Quarterly Journal of Geosciences

Scientific Quarterly Journal of Geosciences

Analysis of sedimentary facies and depositional environment of the Aghajari Formation, north of Hosseinieh, Andimeshk, Khuzestan Province

Document Type : Original Research Paper

Authors
Department of Geology, Faculty of Basic Sciences, Bu-Ali Sina University, Hamedan, Iran
10.22071/gsj.2026.552988.2229
Abstract
This study aims to investigate the depositional environment of the Aghajari Formation (Upper Miocene-Pliocene) in the Hosseiniyeh area (Andimeshk). In this regard, three stratigraphic sections (Pa’alam, Khoshab, and Pirvali) were selected for study. The Aghajari Formation consists of sandstone, siltstone, mudstone, and shale, with a thickness exceeding 500 meters in the examined regions. Investigations in the field revealed 11 lithofacies, which include 6 sandstone facies (Sp/St/Sm/Sh/Sr/Sfl), 2 mudstone facies (Fm/Fl), 1 carbonate facies (bioclastic wackestone), 1 gray shale facies, and 1 skolithos ichnofacies. Evidence collected in the field suggests that the Pa’alam section exhibits characteristics of a deltaic environment, with delta-front facies containing sediments from the mouthbar, delta slope, and prodelta. In contrast, the deltatop facies includes deltaic channels and deltaic plains. This facies association constitutes the lower section of the Aghajari Formation. The upper part of the Aghajari Formation found in the Pa’alam section displays features typical of meandering rivers. The delta identified in the Pa’alam section is primarily river-influenced, with minimal tidal impact, where the maximum thickness of the tidal flat sediments reaches 2 meters. The two additional sections (Khoshab and Pirvali) were formed in a meandering river environment.
Keywords
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Volume 36, Issue 2 - Serial Number 140
Summer 2026, Vol. 36, Issue 2, Serial No. 140
Spring 2026
Pages 1-26