Neogene sedimentary rocks are exposed in the Chittagong Tripura Folded Belt (CTFB) Region Bengal Basin. Sitapahar anticline is situated middle part of CTFB Region. In this structure, eleven litho-facies have been identified fluvial, overbank, shallow marine, deltaic, and deep marine depositional environments. Surma Group composed Bhuban Boka Bil formation during Miocene time was deposited envir...