Paleogene:
The Paleogene (/ˈpæliːɵdʒiːn/ or /ˈpeɪliːɵdʒiːn/; also spelled Palaeogene or Palæogene; informally Lower Tertiary) is a geologic period and system that began and ended million years ago and comprises the first part of the Cenozoic Era.
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古近纪:
古近纪（Paleogene，符号E），旧称早第三纪，是地质时代中的一个纪，开始于同位素年龄65.5±0.3百万年（Ma），结束于23.03±0.05Ma。
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Paleogene古近纪