Judging from the stratigraphical sequence and the characteristics of this flora, the geological age of the said coal series is late Pliocene.
从地层层序和植物群的特点上看，该煤组的地质时代为上新世晚期。
The geological age of the present sandstone series is not earlier than the middle-late Pliocene.
因此，含高山栎岩系的地质时代不会早于上新世中晚期。
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