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根据广东台山广海湾150km高分辨率地震资料，研究岬湾型海岸起伏多变的基底和上覆的第四纪沉积层序、沉积演化以及复杂的新构造作用。该区晚第四纪自下而上发育有5个层序：（1）滨海相杂色粘土，下部为河道充填；（2）河道冲积砂；（3）内大陆架粉砂质粘土；（4）滨海相潮坪沉积;（5）河口湾淤泥质沉积。研究区基底形态起伏较大，主要为黑云母花岗岩风化壳及少量变质岩。NNE和NEE向两组断裂系统最为发育，它们控制了盆地发展并经历了两期活动。
Based on the 150km high-resolution seismic data from Guanghai Bay, Guangdong Province, the fluctuating basement and overlying Quaternary sedimentary sequence, sedimentary evolution and complex neotectonics of the promontory coast are studied. In the late Quaternary, there are five sequences developed from the bottom to the top: (1) coastal variegated clay with fluvial filling in the lower part; (2) fluvial alluvial sand; (3) silty clay in the continental shelf; (4) ) Coastal tidal flat sediment; (5) estuarine muddy sediments. The basement of the study area has great ups and downs in shape, mainly composed of biotite granite weathering crust and a few metamorphic rocks. NNE and NEE developed the most into the two fault systems, controlling the basin development and undergoing two phases of activity.