The geological structure of Sitakunda, long and wide, is one of the westernmost structures of Chittagong and Chittagong Hill Tracts, delimited by the Feni River in the north, the Karnaphuli River in the south, the Halda River in the east and the Sandwip Channel in the west. The Sitakunda Range acts as a water divide between the Halda Valley and the Sandwip Channel. The -long Halda flows from Khagrachari to the Bay of Bangal, and is one of the six tributaries of Karnafuli, the major river in the area. Sandwip Channel represents the northern end of the western part of the Chittagong-Tripura Folded Belt.