Ma 5(subscript 1-4) submember is an asymmetric long-term base level cycle which can be divided into five middle-term base level cycles and more than 26 short-term base level cycles.

• 马五(下标1-4)亚段构成了一个长期基准面下降半旋回，其又可划分为5个中期基准面沉积旋回及多于26个短期基准面沉积旋回。