Guangzhou and Sediments in Qiongzhou Strait, China23.1N 113.2E
Sediments line the coast of China and are present in the Qiongzhou Strait, also called the Hainan Strait, a body of water that separates the Leizhou Peninsula in Guangdong, southern China, to the north, from Hainan Island to the south. The strait connects the Gulf of Tonkin in the west to the James Shoal on the eastern edge of the South China Sea. The strait is on average 30 km wide with a maximum water depth of approximately 120 m.
Also of note near the coast is the sprawling, grey area that demarcates the city of Guangzhou, known historically as Canton, the capital and largest city of the Guangdong province in the People’s Republic of China. Located in southern China on the Pearl River, about 120 km north-northwest of Hong Kong, Guangzhou is the third largest city in China and southern China’s largest city. As of the 2010 census, the city had a population of 12.78 million. Some estimates place the population of the entire Pearl River Delta Mega City built up area as high as 40 million.