Because of its late subsidence, the different landforms in the south and north parts were unified into a simple depression, thus the late sedimentary formations were formed.

第三阶段晚白垩世拗陷回返，结束了南北分带的地貌，形成了统一的简单洼地，接受了拗陷末期的沉积。

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Because of its late subsidence, the different landforms in the south and north parts were unified into a simple depression, thus the late sedimentary formations were formed.

第三阶段晚白垩世拗陷回返，结束了南北分带的地貌，形成了统一的简单洼地，接受了拗陷末期的沉积。

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