The structure contains a thick sedimentary sequence of sandstone, shale and siltstone. The exposed sedimentary rock sequences except limestone, thick in an average, provide no difference in overall lithology of Chittagong and Chittagong Hill Tracts. The Sitakunda fold is an elongated, asymmetrical, box-type double plunging anticline. Both the gently dipping eastern and steeper western flanks of the anticline are truncated abruptly by the alluvial plain of the Feni River. For a lack of infrastructure in Bangladesh, this anticline is one of the few regularly surveyed structures in the country. The syncline from Sitakunda separates the eastern end of the Feni Structure located in the folded flank of the Bengal Foredeep.