During the Quaternary Period, there buried seven-stages of paleochannels, corresponding to the tectonic movement, the alteration of paleoclimate and the fluctuation of the sea level.

• 在第四纪时期,上海及长江口由于地质构造、古气候、海面升降等综合作用,第四纪沉积层中与之相适应的埋盖了七期古河道。