Delta facies mainly distributed in the west , northeast , and southeast ; the ancient land mass nearby is the main source system ; the carbonate platform is mainly in the northwest and east of the work area ; the neritic bathyal phase is widely distributed .

三角洲相主要分布在西部、东北部、东南部；临近的古陆剥蚀区是主要的陆源沉积体系；碳酸盐岩台地相主要分布在研究区西北部、东部；浅海相分布广泛。