华南沿海全新世海平面变动的几个问题

SOME QUESTIONS ABOUT SEA LEVEL CHANGES DURING THE HOLOCENE IN COASTAL AREA OF SOUTH CHINA

本文根据华南沿海各地全新世海相、滨海相沉积物的^(14)C断代数据、海拔高程及其所构成地貎体的特征,探讨了该区全新世以来的海陆变迁。

The paper deals with the changes between sea and land in the coastal area in South China since the Holocene,based on the distribution of various marine sediments related to fossil coast line.The author concludes that the Postglacial transgression started about 8,500 y B.P.and Penetrated into the costal land area in South China about 6,000 y B.P..The transgression arrived at its peak stage from 6,000 y B.P.to 4,000 y B.P..In comparison with that in North China and Central China,the transgtession in South China was late in starting time and small in scale due to the effects of the tectonic movement.The preliminary studies indicate that the sea level changes since 6,000 y B.P.were in the mode of oscillation.High sea level higher than the present day sea level occurred 6,000—4,000 y B.P.and after that,alternation of transgression and regression proceeded in the trend towards the present day sea level.