Redigerer Mal:Starten på periode

<includeonly>{{#expr:{{#switch:{{lc:{{{1|{{PAGENAME}}}}}}}
<!-- We can also include notable dates which are subject to change, e.g. Burgess shale-->
|burgess shale|mid midtre kambrium<!--Mid midtre is approximate; cf. Burgess Shale-->=505
|chengjiang=524
|sirius passet=525
|doushantou=570


|hadeikum|prekambrium=4567.17
|arkeikum
 |eoarkeikum|isuan=3800
 |paleoarkeikum|palaeoarkeikum=3600
 |mesoarkeikum=3200
 |neoarkeikum=2800
|proterozoikum
 |paleoproterozoikum|palaeoproterozoikum
  |siderian=2500
  |rhyacian=2300
  |orosirian=2050
  |statherian=1800
 |mesoproterozoikum
  |calymmian=1600
  | riphean|ectasian=1400
  | stenian=1200
 |neoproterozoikum
  |tonian=1000
  | cryogenian|baikalian=850 
  | ediacara|vendian=630
  | mayanian=1100
  | sinian|sturtian=1050
|fanerozoikum
 |paleozoic
  |kambrium
   |earliest kambrium|tidlig kambrium|nedre kambrium|terreneuvian|fortunean|manykaian|nemakit-daldynian=542
   |caerfai|tommotian=530
   |kambrium stage 2=528
   |atdabanian|series 2|kambrium series 2|stage 3|kambrium stage 3|mid tidlig kambrium|midtre tidlig kambrium=526
   |botomian=522
   |toyonian|sen tidlig kambrium|øvre tidlig kambrium|øvre nedre kambrium=516
   |kambrium stage 4|stage 4=515
   |midtre kambrium|tidlig midtre kambrium|mid kambrium|series 3|kambrium series 3|kambrium stage 5|stage 5|st davids=513
   |drumian=506.5
   |guzhangian|nganasanian|mindyallan=503
   |merioneth|furongian=501
   |sen kambrium|øvre kambrium|paibian|franconian<!--unofficial and approximate!-->=499
   |øvre øvre kambrium|sen sen kambrium|mansian=490<!--Arbritary number.-->
      | ordovicium|tidlig ordovicium|nedre ordovicium|tremadocian=488.3
      | sen tidlig ordovicium=479
      | arenig|floian=478.6
      |dapingian|midtre ordovicium|mid ordovicium|ordovicium iii|tidlig midtre ordovicium=471.8
      | darriwilian=468.1
      |sen ordovicium|øvre ordovicium|ordovicium v|sandbian|tidlig sen ordovicium=460.9
      | ordovicium vi|katian=455.8
      | hirnantian=445.6
      | midtre sen ordovicium=455
      | silur|tidlig silur|nedre silur|llandovery|rhuddanian=443.7
        |aeronian=439
        |telychian=436
      | wenlock|sheinwoodian=428.2
      |homerian=426.2
      |sen silur|øvre silur|ludlow|gorstian=422.9
      |ludfordian=421.3
      | pridoli|unnamed pridoli stage=418.7
        | devon|tidlig devon|nedre devon|lochkovian|downtonian|devon (geologi)<!--approx-->=416
      | pragian|praghian=411.2
        | emsian=407
      |midtre devon|mid devon|eifelian=397.5
      | givetian=391.8
      |sen devon|øvre devon|frasnian=385.3
      | famennian=374.5
      | tidlig karbon|nedre karbon|karbon|karbon (geologi)|mississippian|tidlig mississippian|nedre mississippian|tournaisian=359.2
      | midtre mississippian|visean=345.3
      | sen mississippian|serpukhovian=326.4
      | namurian=326
      | øvre karbon|sen karbon|pennsylvanian|tidlig pennsylvanian|nedre pennsylvanian|bashkirian=318.1
      | westphalian = 313
      | midtre pennsylvanian|moscovian=311.7
        | sen pennsylvanian|kasimovian=306.5
      |stephanian=304
      |gzhelian=303.9
        | perm|perm (geologi)|tidlig perm|nedre perm|cisuralian|asselian=299
      | sakmarian=294.6
      | artinskian=284.4
      | kungurian=275.6
      | guadalupian=272.5
      |midtre perm|mid perm|roadian|ufimian=270.6
        | wordian=268
      | capitanian=265.8
      |sen perm|øvre perm|lopingian|wuchiapingian|longtanian=260.4
      | changhsingian=253.8
        |mesozoikum|trias|tidlig trias|nedre trias|induan=251
      | olenekian|spathian=249.7
        |midtre trias|mid trias|anisian=245
          | ladinian=237
          |sen trias|øvre trias|carnian=228
        | norian=216.5
      | rhaetian=203.6
      | jura|jura (geologi)|tidlig jura|nedre jura|hettangian=199.6
        | sinemurian=196.5
      | pliensbachian=189.6
        | toarcian=183
        |midtre jura|mid jura|aalenian=175.6
        | bajocian=171.6
      | bathonian=167.7
        | callovian=164.7
        |sen jura|øvre jura|oxfordian=161.2
        | kimmeridgian=155.7
        | tithonian=150.8
        | kritt|kritt (geologi)|tidlig kritt|nedre kritt|berriasian|neocomian=145.5
        | valanginian=140.2
        | hauterivian=136.4
        | barremian|gallic=130
          | aptian=125
          | albian=112
       |sen kritt|øvre kritt|cenomanian=99.6
       | turonian=93.5
         | coniacian|senonian=89.3
       | santonian=85.8
       | campanian=83.5
       | maastrichtian=70.6
       |kenozoikum|paleogen|paleocen|tidlig paleocen|nedre paleocen|tertiær|danian=65.5
       | puercan=65
       | torrejonian=63.3
       | midtre paleocen|selandian=61.7
       | tiffanian=60.2
       | sen paleocen|thanetian=58.7
       | clarkforkian=56.8
       |eocen|tidlig eocen|nedre eocen|ypresian|mp 10=55.8
       |wasatchian=55.4
       |bridgerian=50.3
       | midtre eocen|lutetian|mp 11=48.6
       |uintan=46.2
       |duchesnean=42
       |bartonian=40.4
       |chadronian=38
       | sen eocen|priabonian=37.2
       |oligocen|tidlig oligocen|nedre oligocen|rupelian|orellan=33.9
       |whitneyan=33.3
       |arikeean=30.6
       | sen oligocen|chattian=28.4
     | neogen|miocen|tidlig miocen|nedre miocen|aquitanian=23.03
     |hemingfordian=20.6
     |burdigalian=20.43
     |barstovian=16.3
     | midtre miocen|langhian=15.97
     |serravallian=13.65
     |clarendonian=13.6
   | sen miocen|tortonian=11.608
     |hemphillian=10.3
    |messinian=7.246
    |pliocen|tidlig pliocen|nedre pliocen|zanclean=5.332
    |blancan=4.75
      | sen pliocen|piacenzian=3.600
    |pleistocen|tidlig pleistocen|nedre pleistocen|gelasian=2.588
    |calabrian=1.806
    |irvingtonian=1.8
    | midtre pleistocen=0.781
    |rancholabrean=.24
    | sen pleistocen=0.126
|kvartær=2.588<!-- ratified in doi:10.1002.2Fjqs.1338-->
|holocen=0.01143

|intil nylig|nålevende|nå=0}} round {{{2|5}}}}}</includeonly><noinclude>{{documentation}}</noinclude>