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.
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- 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。