GEOLOGICAL PARAMETERS AND KNOWLEDGE ABOUT EARTH LAYERS AND TEXTURE IN ANY AREA ARE OF FUNDAMENTAL IMPORTANCE FOR DESIGNING COASTAL PROJECTS AND SEAPORTS, AND THEY NEED TO BE CONSIDERED DURING INITIAL STAGES. THESE PARAMETERS HELP DETERMINE FAVORABLE LOCATIONS FOR PORTS, AND AT TIMES DICTATE THEIR RELATION AS WELL. THE MAJOR ONES ARE GEOLOGICAL CONSIDERATIONS, PERIODICAL SEDIMENTATION BY MARINE CURRENTS, PERIODICAL SEDIMENTATION BY FLUVIAL CURRENTS, AND PERIODICAL CLIMATIC CHANGES. IN THIS PAPER, THE RELEVANT features OF THE NORTHERN COASTLINE OF THE PERSIAN GULF, AND THE FACTORS AFFECTING GEOTECHNICAL CHANGES IN THE COASTAL AREAS OF IRANIAN PROVINCES KHUZESTAN, BUSHEHR AND HORMOZGAN ARE CONSIDERED AND IDENTIFIED. THE RESULTING DATA CAN LATER BE USED IN GEOLOGICAL STUDIES FOR DESIGNING PORTS AND OTHER COASTAL PROJECTS IN THE ABOVE MENTIONED AREAS.