Our investigation suggests that tectonically induced channel migration and southward shift of the Yangtze deltaic depocenter are continuing at present.

• 这表明了本区沉降中心从北部逐渐向南转移的趋势，反映了南部基底构造在第四纪以来有明显下沉的迹象，是长江主河道南迁的主要地质引力。