! [[Periodo (geologia)|Periodoa]]{{efn|Paleontologoek periodo geologikoen inguruan baino animalien inguruan egin ohi dute bereizketa.}}
! [[Period (geology)|Period]]{{efn|Paleontologists often refer to [[faunal stage]]s rather than geologic (geological) periods. The stage nomenclature is quite complex. For a time-ordered list of faunal stages, see.<ref name="faunal-stages">{{cite web |url=http://flatpebble.nceas.ucsb.edu/cgi-bin/bridge.pl?action=startScale |title=The Paleobiology Database |accessdate=2006-03-19 |deadurl=yes |archiveurl=https://web.archive.org/web/20060211234211/http://flatpebble.nceas.ucsb.edu/cgi-bin/bridge.pl?action=startScale |archivedate=11 February 2006 |df=dmy }}</ref>}}
! StartHasiera, millionorain yearsmilioi agourte{{efn|name="uncertain-dates"|DatesDaten areziurtasuna slightlyez uncertainda withosoa, differenceseta ofportzentajea abatean fewmugitzen percentda, betweendatazio variouserradiometrikoak sourcesegiten beingbaitira common.eta Thishau isez largelyda duemetodo toguztiz uncertainties in [[radiometric dating]] and the problem that deposits suitable for radiometric dating seldom occur exactly at the places in the geologic column where they would be most usefulzehatza. TheHala datesere and errorshemen quotedagertzen abovediren aredatak accordingeta tobere theerroreak [[International Commission on Stratigraphy]]-ak 2015onartu timezituen scale2004an. except[[Fitxategi:Clavo the Hadean eondorado.svg|12px]] Wherebat errorsduten aredatek not"Urrezko quoted,Iltzea" errorsdutela areesan lessnahi thanud, thehau precisionda, ofleku thebatean agebi given.<brgaraien /><brarteko /><nowiki>*</nowiki>muga indicateszehaztu boundariesdela where a [[(Global Boundary Stratotype Section and Point]] has been internationally agreed upon).}}
|-
|rowspan="102" style="background:#ffffff"| n/a{{efn|References to the "Post-Cambrian Supereon" are not universally accepted, and therefore must be considered unofficial.}}
