The durations of them are 230Ma, 203Ma, 221.4Ma and 145.6Ma respectively. The process from Cretaceous to Present passed only 3/4 of a complete cycle.

• 它们持续的时间分别为230，203，221?4，145?6Ma，其中白垩纪至今盆地演化过程大致经历了一个完整周期的3/4。