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本文阐述了九龙江河口 ＳＤ０３孔 ３１个主要硅藻种的分布特征，并把该孔细分为３个硅藻段、９个硅藻带且结合~(１４)Ｃ测年资料进行了地层的划分。结果表明，该孔全长３６ｍ的沉积物属于全新世沉积，全新世海面在总体上升的过程中，约在８ｋａ，Ｂ．Ｐ．发生过短暂的下降。
This paper presents the distribution characteristics of 31 major diatom species in SD03 hole of Jiulongjiang estuary, and subdivides the hole into three diatoms, nine diatoms and combined with ~ (14) C dating data. The division. The results show that the sediment belongs to the Holocene sediments with a total length of 36 m. During the Holocene sea level rise, the sediment is about 8 ka, B. P. A brief decline occurred.