Template:Period start
|burgess shale|middle middle cambrian=508
|chengjiang=518
|sirius passet=518
|doushantou=570
| precambrian
| hadean = 4567
| archean
| eoarchean | isuan = 4031
| paleoarchean = 3600
| mesoarchean = 3200
| neoarchean = 2800
| proterozoic
| paleoproterozoic
| siderian = 2500
| rhyacian = 2300
| orosirian = 2050
| statherian = 1800
| mesoproterozoic
| calymmian = 1600
| ectasian | riphean
= 1400
| stenian = 1200
| mayanian = 1100
| sinian | sturtian
= 1050
| neoproterozoic
| tonian = 1000
| baikalian = 850
| cryogenian = 720
| ediacaran | vendian
= 635
| phanerozoic
| paleozoic
| cambrian
| lower cambrian
| terreneuvian | lowest cambrian | earliest cambrian
| fortunian
| manykaian | nemakit daldynian
= 538.8
| caerfai | tommotian
= 530
| cambrian stage 2
= 529
| cambrian series 2
| cambrian stage 3 | middle lower cambrian
| atdabanian = 521
| botomian = 522
| toyonian | upper lower cambrian
= 516
| cambrian stage 4
= 514.5
| cambrian series 3 | middle cambrian | miaolingian
| cambrian stage 5 | lower middle cambrian | st davids | wuliuan
= 506.5
| drumian = 504.5
| guzhangian | nganasanian | mindyallan
= 500.5
| furongian | upper cambrian | merioneth
| paibian | franconian
= 497
| jiangshanian = 494.2
| upper upper cambrian | mansian
= 489.5
| cambrian stage 10 = 491.0
| ordovician
| lower ordovician
| tremadocian = 486.85
| upper lower ordovician
= 479
| floian | arenig
= 477.1
| middle ordovician
| dapingian | ordovician iii | lower middle ordovician
= 471.3
| darriwilian = 469.4
| upper ordovician
| sandbian | ordovician v | lower upper ordovician
= 458.2
| middle upper ordovician
= 455
| katian | ordovician vi
= 452.8
| hirnantian = 445.2
| silurian
| llandovery | lower silurian
| rhuddanian = 443.1
| aeronian = 440.5
| telychian = 438.6
| wenlock
| sheinwoodian = 432.9
| homerian = 430.6
| ludlow | upper silurian
| gorstian = 426.7
| ludfordian = 425
| pridoli
| unnamed pridoli stage
= 422.7
| devonian
| lower devonian
| lochkovian | downtonian
= 419.62
| pragian | praghian
= 413.02
| emsian = 410.62
| middle devonian
| eifelian = 393.47
| givetian = 387.95
| upper devonian
| frasnian = 382.31
| famennian = 372.15
| carboniferous
| mississippian | lower carboniferous
| lower mississippian
| tournaisian = 358.86
| middle mississippian
| visean = 346.7
| upper mississippian
| serpukhovian = 330.3
| namurian = 326
| pennsylvanian | upper carboniferous
| lower pennsylvanian
| bashkirian = 323.4
| westphalian= 313
| middle pennsylvanian
| moscovian = 315.2
| upper pennsylvanian
| kasimovian = 307.0
| stephanian = 304
| gzhelian = 303.7
| permian
| cisuralian | lower permian
| asselian = 298.9
| sakmarian = 293.52
| artinskian = 290.1
| kungurian = 283.3
| guadalupian | middle permian
| roadian | ufimian
= 274.4
| wordian = 266.9
| capitanian = 264.28
| lopingian | upper permian
| wuchiapingian | longtanian
= 259.51
| changhsingian= 254.14
| mesozoic
| triassic
| lower triassic
| induan = 251.902
| olenekian | spathian
= 249.9
| middle triassic
| anisian = 246.7
| ladinian = 241.464
| upper triassic
| carnian = 237
| norian = 227.3
| rhaetian = 205.7
| jurassic
| lower jurassic
| hettangian = 201.4
| sinemurian = 199.5
| pliensbachian= 192.9
| toarcian = 184.2
| middle jurassic
| aalenian = 174.7
| bajocian = 170.9
| bathonian = 168.2
| callovian = 165.3
| upper jurassic
| oxfordian = 161.5
| kimmeridgian = 154.8
| tithonian = 149.2
| cretaceous
| lower cretaceous
| berriasian | neocomian
= 143.1
| valanginian = 137.05
| hauterivian = 132.6
| barremian | gallic
= 125.77
| aptian = 121.4
| albian = 113.2
| upper cretaceous
| cenomanian = 100.5
| turonian = 93.9
| coniacian | senonian
= 89.8
| santonian = 85.7
| campanian = 83.6
| maastrichtian= 72.2
| cenozoic
| tertiary
| paleogene
| paleocene
| danian | lower paleocene
= 66.0
| puercan = 65
| torrejonian= 63.3
| selandian | middle paleocene
= 61.66
| tiffanian = 60.2
| thanetian | upper paleocene
= 59.24
| clarkforkian
= 56.8
| eocene
| ypresian | lower eocene | mp 10
= 56.00
| wasatchian = 55.4
| bridgerian = 50.3
| middle eocene
| lutetian | mp 11
= 48.07
| uintan = 46.2
| duchesnean = 42
| bartonian = 41.03
| chadronian = 38
| priabonian | upper eocene
= 37.71
| oligocene
| rupelian | lower oligocene
| orellan = 33.90
| whitneyan = 33.3
| arikeean = 30.6
| chattian | upper oligocene
= 27.30
| neogene
| miocene
| lower miocene
| aquitanian = 23.04
| hemingfordian
= 20.6
| burdigalian = 20.45
| barstovian = 16.3
| middle miocene
| langhian = 15.98
| serravallian = 13.82
| clarendonian
= 13.6
| upper miocene
| tortonian = 11.63
| hemphillian= 10.3
| messinian = 7.246
| pliocene
| zanclean | lower pliocene
= 5.333
| blancan = 4.75
| piacenzian | upper pliocene
= 3.600
| quaternary
| pleistocene
| lower pleistocene
| gelasian = 2.58
| calabrian = 1.80
| irvingtonian
= 1.8
| middle pleistocene | ionian | chibanian
= 0.774
| rancholabrean
= 0.24
| upper pleistocene | tarantian
= 0.129
| holocene
| greenlandian | lower holocene
= 0.0117
| northgrippian | middle holocene
=0.0082
| meghalayan | upper holocene
=0.0042
|
| now | recent | present | current
= 0
}} round {{{2|5}}}}}