One in a Krillion +100EdiacaranDeep Cut +85CalymmianCisuralianCryogenianEctasianEoarcheanFurongianGuadalupianLlandoveryLopingianLudlowMesoarcheanMesoproterozoicMississippianNeoarcheanNeoproterozoicOrosirianPaleoarcheanPaleoproterozoicPennsylvanianPridoliRhyacianSiderianStatherianStenianTerreneuvianTonianWenlockRare +60ArcheanEoceneHadeanMioceneNeogeneOligoceneOrdovicianPaleocenePaleogenePhanerozoicPlioceneProterozoicQuaternarySilurianTertiarySchooler +30CambrianCenozoicDevonianHoloceneMesozoicPaleozoicPermianPleistocenePrecambrianToo Clever +15AnthropoceneCarboniferousPlankton +10CretaceousJurassicTriassic