The bay is formed by down-faulted depressed block of undersea bed creating a submerged bay.
The water depth around the bay range from 6 to 25 metres and has a deep water coastal area of 30km.
Economy
Xiamen Bay is an important economic region for Xiamen as well as the whole of Fujian Province. The bay has numerous port, transport infrastructure, shipbuilding and petrochemical industries. The local government has set up various development areas such as the Xiamen Bay Photoelectric Industrial City to promote economic development.
Due to rapid economic development and industrialization in Xiamen, the bay has been tested for traces of heavy metal contamination.
↑Terry R. Healy, Ying Wang, Judy-Ann Healy, 2002, Muddy coasts of the world: processes, deposits, and function, Volume 4 of Proceedings in marine science, Gulf Professional Publishing, ISBN0-444-51019-2, ISBN978-0-444-51019-8, p. 339
12Zhang, Luoping; Feng, Huan; Li, Xiaoxia; Ye, Xin; Jing, Youhai; Ouyang, Tong; Yu, Xingtian; Liang, Rongyuan; Chen, Weiqi (2009), "Heavy metal contaminant remediation study of western Xiamen Bay sediment, China: Laboratory bench scale testing results", Journal of Hazardous Materials, 172 (1): 108–16, doi:10.1016/j.jhazmat.2009.06.138, PMID19631459
↑Y. M. Yeung, Jianfa Shen, 2008, The Pan-Pearl River Delta: an emerging regional economy in a globalizing China, Chinese University Press, ISBN962-996-376-0, ISBN978-962-996-376-7, pp. 125–126