era

特殊用法Anthropozoic era1.■灵生代Archaeozoic era1.■太古代astral era1.■星云时代azoic era1.■无生物代Cenozoic era1.■新生代Kainozoic era1.■新生代Lepton era1.■【天物】轻子时代matter era1.■【天物】物质时代Mesozoic era1.■中生代Palaeozoic era1.■古生代Pennsylvanian era1.■宾夕法尼亚纪子源polarity era1.■极性代Proterozoic era1.■元古代radiation era1.■【天物】辐射时代secondary era1.■中生代tertiary era1.■第三纪[系]