Abstract: The ages of Ostrea shells in silt layers of the depths of -36.80m and -36.35m for ZK₁ and ZK₂ drill holes are (45120?910)a B.P. and (44870?900)a B.P.,respectively at the site of Geli Great Commerce Mansion of Zhongshan City of Guangdong Province. It is the earliest transgression layer since 50000a B.P. that has been covered so far in the Zhujiang (pearl) Delta and along the coast of China. The confirmed sediment of littoral facies have been almost continuous since 45000a B.P. 18 samples of sediment of littoral facies at various depths have been compared with 82 samples of sediment of littoral facies of 38 drill holes in other areas in the Zhujiang Delta and southeast coast of China. The results show that the range of uplift and subsidence of the site is smallest and the crust at the site has been stable since 45000a B.P. and hence a related curve of "eustatic" sea level changes can be obtained. The curve shows that the sea levels were roughly -34.7m to -10.9m for (45120?910)a B.P. to (24410?470)a B.P.,-9.85m to -3.25m for (23750?890)a B.P. to (12580?400)a B.P.,-2m for 8000a B.P.,-1.1m for 4000a B.P.,and -0.03m for (2130?90)a B.P.,and the rising rate of sea level in the Holocene (0.58 to 0.01mm/a) was substantially lower than that in the Late Pleistoncene (4.84 to 0.51mm/a).

Key words: Late Pleistocene Epoch, Sea-level change, Guangdong, Transgression layer

摘要： 中山市珠海格力商业大厦场址钻孔表明,距今(45120±910)a海水已经侵入珠江三角洲地区,当时海平面约在-34.7m。沉积剖面及其比较研究表明,场区从晚更新世海侵以来是连续的滨海相沉积;场区还是晚更新世海侵以来差异构造运动显着的珠江三角洲(乃至东南沿海)地区地壳的一块“稳定小岛”。其晚更新世以来的滨海相沉积反映了渐进上升的实际水动型海平面变化。

关键词: 晚更新世, 海平面变化, 广东, 海侵层