Paleocene The oldest epoch of the Tertiary, 65-55million yesrs ago.
Paleocene The oldest epoch of the Tertiary, 65-55million yesrs ago.
古新世：第三纪最古的年代，6500万～5500万年前。
Paleocene The oldest epoch of the Tertiary, 65-55million yesrs ago.
古新世：第三纪最古的年代，6500万～5500万年前。