阶地序列
阶地序列-
河流阶地序列的年代学研究是河流地貌研究中的重要课题，河流最高级阶地的形成与发育则代表了河流在此地区形成的底界时间。
Study on chronology of river terraces is a significant subject in the river geomorphology . However the formation and development of the highest river terrace indicated the latest time of river formed in general .
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从而初步建立了三峡库区阶地堆积的时间序列。
Consequently , an approximate time series of terrace accumulation is established .