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对台湾海峡西部海域及河口平原１４个钻孔剖面经孢粉、１４Ｃ年龄和古地磁测定确定为晚玉木冰期的沉积层（Ｑ３３）样品进行了硅藻、有孔虫分析。结果表明，该时期海域的沉积层均属海相沉积，而河口平原区的沉积层则由海相和陆相地层交互组成。据此，提出了台湾海峡在晚玉木冰期属于水深在３０～５０ｍ的浅海沉积环境的观点；阐述了这一与全球性气候冷暖更替所引起的海平面升降不一致现象是由于晚玉木冰期台湾海峡的地壳运动正处于间歇性下降时期，从而保持了浅海环境。
The diatom and foraminifera were analyzed for the sediments (Q33) determined by the sporopollen, 14C age and paleomagnetism of 14 drilling sections in the western seas and estuarine plain of Taiwan Strait. The results show that the marine sediments in this period are all marine sediments, whereas the sedimentary layers in the estuarine plain are composed of marine and continental facies. Accordingly, the viewpoint that the Taiwan Strait is in the shallow sea sedimentary environment with water depth of 30-50m in Late Yu-Yu Ice Age is proposed. The inconsistency of sea level rise and fall caused by global warming and cold-warm alternation is explained by the fact that the late- Crustal movement is in a period of intermittent decline, thus maintaining a shallow sea environment.