摘要
Ⅰ. INTRODUCTIONThere are many sand bars along the south coast of China, distributed from the south of Fujian, Guangdong, Hainan to Guangxi. After investigating and sampling more than 100 bars, the author has chosen 64 samples for dating and has collected 35 prevenient data in order to study the ages of the bars. The samples got from bars, from beds
基金
Project supported by the National Natural Science Foundation of China