Due to the regression, the submarine fans evolved into waning stage in the Late Cretaceous and the sedimentary rocks changed from shales to coarse sandstones even conglomerates.

• 晚白垩世总体上属于海退过程，海底扇处于消亡阶段，其岩石由泥岩类向砂岩类直至砾岩类演化。